diff --git a/remoteauth/service/Android.bp b/remoteauth/service/Android.bp
index 3486d8c..c7e5419 100644
--- a/remoteauth/service/Android.bp
+++ b/remoteauth/service/Android.bp
@@ -47,6 +47,7 @@
         "modules-utils-preconditions",
         "modules-utils-backgroundthread",
         "presence-lite-protos",
+        "uwb_androidx_backend",
     ],
     sdk_version: "system_server_current",
     // This is included in service-connectivity which is 30+
diff --git a/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingCapabilities.java b/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingCapabilities.java
index 2b5efff..36aa585 100644
--- a/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingCapabilities.java
+++ b/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingCapabilities.java
@@ -15,6 +15,9 @@
  */
 package com.android.server.remoteauth.ranging;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+
 import androidx.annotation.IntDef;
 
 import com.google.common.collect.ImmutableList;
@@ -43,6 +46,8 @@
     public static final int RANGING_METHOD_UWB = 0x1;
 
     private final ImmutableList<Integer> mSupportedRangingMethods;
+    private final androidx.core.uwb.backend.impl.internal.RangingCapabilities
+            mUwbRangingCapabilities;
 
     /**
      * Gets the list of supported ranging methods of the device.
@@ -53,13 +58,28 @@
         return mSupportedRangingMethods;
     }
 
-    private RangingCapabilities(List<Integer> supportedRangingMethods) {
+    /**
+     * Gets the UWB ranging capabilities of the device.
+     *
+     * @return UWB ranging capabilities, null if UWB is not a supported {@link RangingMethod} in
+     *     {@link #getSupportedRangingMethods}.
+     */
+    @Nullable
+    public androidx.core.uwb.backend.impl.internal.RangingCapabilities getUwbRangingCapabilities() {
+        return mUwbRangingCapabilities;
+    }
+
+    private RangingCapabilities(
+            List<Integer> supportedRangingMethods,
+            androidx.core.uwb.backend.impl.internal.RangingCapabilities uwbRangingCapabilities) {
         mSupportedRangingMethods = ImmutableList.copyOf(supportedRangingMethods);
+        mUwbRangingCapabilities = uwbRangingCapabilities;
     }
 
     /** Builder class for {@link RangingCapabilities}. */
     public static final class Builder {
         private List<Integer> mSupportedRangingMethods = new ArrayList<>();
+        private androidx.core.uwb.backend.impl.internal.RangingCapabilities mUwbRangingCapabilities;
 
         /** Adds a supported {@link RangingMethod} */
         public Builder addSupportedRangingMethods(@RangingMethod int rangingMethod) {
@@ -67,9 +87,18 @@
             return this;
         }
 
+        /** Sets the uwb ranging capabilities. */
+        public Builder setUwbRangingCapabilities(
+                @NonNull
+                        androidx.core.uwb.backend.impl.internal.RangingCapabilities
+                                uwbRangingCapabilities) {
+            mUwbRangingCapabilities = uwbRangingCapabilities;
+            return this;
+        }
+
         /** Builds {@link RangingCapabilities}. */
         public RangingCapabilities build() {
-            return new RangingCapabilities(mSupportedRangingMethods);
+            return new RangingCapabilities(mSupportedRangingMethods, mUwbRangingCapabilities);
         }
     }
 }
diff --git a/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingManager.java b/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingManager.java
index 989b5ed..5a41aac 100644
--- a/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingManager.java
+++ b/remoteauth/service/java/com/android/server/remoteauth/ranging/RangingManager.java
@@ -15,7 +15,18 @@
  */
 package com.android.server.remoteauth.ranging;
 
+import static android.content.pm.PackageManager.FEATURE_UWB;
+
+import static com.android.server.remoteauth.ranging.RangingCapabilities.RANGING_METHOD_UWB;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.content.Context;
+import android.os.Build;
+import android.util.Log;
+
+import androidx.core.uwb.backend.impl.internal.UwbFeatureFlags;
+import androidx.core.uwb.backend.impl.internal.UwbServiceImpl;
 
 /**
  * Manages the creation of generic device to device ranging session and obtaining device's ranging
@@ -25,16 +36,46 @@
  * outside of this class.
  */
 public class RangingManager {
+    private static final String TAG = "RangingManager";
 
-    public RangingManager(Context context) {}
+    private Context mContext;
+    @NonNull private RangingCapabilities mCachedRangingCapabilities;
+    @NonNull private UwbServiceImpl mUwbServiceImpl;
+
+    public RangingManager(@NonNull Context context) {
+        mContext = context;
+        if (mContext.getPackageManager().hasSystemFeature(FEATURE_UWB)) {
+            initiateUwb();
+        }
+    }
+
+    /**
+     * Shutdown and stop all listeners and tasks. After shutdown, RangingManager shall not be used
+     * anymore.
+     */
+    public void shutdown() {
+        if (mUwbServiceImpl != null) {
+            mUwbServiceImpl.shutdown();
+        }
+        Log.i(TAG, "shutdown");
+    }
 
     /**
      * Gets the {@link RangingCapabilities} of this device.
      *
      * @return RangingCapabilities.
      */
+    @NonNull
     public RangingCapabilities getRangingCapabilities() {
-        return null;
+        if (mCachedRangingCapabilities == null) {
+            RangingCapabilities.Builder builder = new RangingCapabilities.Builder();
+            if (mUwbServiceImpl != null) {
+                builder.addSupportedRangingMethods(RANGING_METHOD_UWB);
+                builder.setUwbRangingCapabilities(mUwbServiceImpl.getRangingCapabilities());
+            }
+            mCachedRangingCapabilities = builder.build();
+        }
+        return mCachedRangingCapabilities;
     }
 
     /**
@@ -42,9 +83,23 @@
      * provided based on the rangingCapabilities of the device.
      *
      * @param sessionParameters parameters used to setup the session.
-     * @return the created RangingSession.
+     * @return the created RangingSession. Null if session creation failed.
      */
-    public RangingSession createSession(SessionParameters sessionParameters) {
+    @Nullable
+    public RangingSession createSession(@NonNull SessionParameters sessionParameters) {
         return null;
     }
+
+    /** Initiation required for ranging with UWB. */
+    private void initiateUwb() {
+        UwbFeatureFlags uwbFeatureFlags =
+                new UwbFeatureFlags.Builder()
+                        .setSkipRangingCapabilitiesCheck(
+                                Build.VERSION.SDK_INT <= Build.VERSION_CODES.S_V2)
+                        .setReversedByteOrderFiraParams(
+                                Build.VERSION.SDK_INT <= Build.VERSION_CODES.TIRAMISU)
+                        .build();
+        mUwbServiceImpl = new UwbServiceImpl(mContext, uwbFeatureFlags);
+        Log.i(TAG, "RangingManager initiateUwb complete");
+    }
 }
diff --git a/remoteauth/service/java/com/android/server/remoteauth/ranging/SessionInfo.java b/remoteauth/service/java/com/android/server/remoteauth/ranging/SessionInfo.java
index 5e4fc48..0ec640c 100644
--- a/remoteauth/service/java/com/android/server/remoteauth/ranging/SessionInfo.java
+++ b/remoteauth/service/java/com/android/server/remoteauth/ranging/SessionInfo.java
@@ -41,6 +41,16 @@
         mRangingMethod = rangingMethod;
     }
 
+    @Override
+    public String toString() {
+        return "SessionInfo { "
+                + "DeviceId = "
+                + mDeviceId
+                + "RangingMethod = "
+                + mRangingMethod
+                + " }";
+    }
+
     /** Builder class for {@link SessionInfo}. */
     public static final class Builder {
         private String mDeviceId = "";
diff --git a/remoteauth/tests/unit/Android.bp b/remoteauth/tests/unit/Android.bp
index 4b92d84..629d360 100644
--- a/remoteauth/tests/unit/Android.bp
+++ b/remoteauth/tests/unit/Android.bp
@@ -35,13 +35,20 @@
     static_libs: [
         "androidx.test.ext.junit",
         "androidx.test.rules",
+        "com.uwb.support.generic",
         "framework-remoteauth-static",
         "junit",
         "libprotobuf-java-lite",
+        "mockito-target-extended-minus-junit4",
         "platform-test-annotations",
         "service-remoteauth-pre-jarjar",
         "truth-prebuilt",
     ],
+    // these are needed for Extended Mockito
+    jni_libs: [
+        "libdexmakerjvmtiagent",
+        "libstaticjvmtiagent",
+    ],
     test_suites: [
         "general-tests",
         "mts-tethering",
diff --git a/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingCapabilitiesTest.java b/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingCapabilitiesTest.java
index e6b6e3b..8135b4f 100644
--- a/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingCapabilitiesTest.java
+++ b/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingCapabilitiesTest.java
@@ -28,16 +28,25 @@
 /** Unit test for {@link RangingCapabilities}. */
 @RunWith(AndroidJUnit4.class)
 public class RangingCapabilitiesTest {
+    private static final androidx.core.uwb.backend.impl.internal.RangingCapabilities
+            TEST_UWB_RANGING_CAPABILITIES =
+                    new androidx.core.uwb.backend.impl.internal.RangingCapabilities(
+                            /* supportsDistance= */ true,
+                            /* supportsAzimuthalAngle= */ true,
+                            /* supportsElevationAngle= */ true);
 
     @Test
     public void testBuildingRangingCapabilities_success() {
         final RangingCapabilities rangingCapabilities =
                 new RangingCapabilities.Builder()
                         .addSupportedRangingMethods(RANGING_METHOD_UWB)
+                        .setUwbRangingCapabilities(TEST_UWB_RANGING_CAPABILITIES)
                         .build();
 
         assertEquals(rangingCapabilities.getSupportedRangingMethods().size(), 1);
         assertEquals(
                 (int) rangingCapabilities.getSupportedRangingMethods().get(0), RANGING_METHOD_UWB);
+        assertEquals(
+                rangingCapabilities.getUwbRangingCapabilities(), TEST_UWB_RANGING_CAPABILITIES);
     }
 }
diff --git a/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingManagerTest.java b/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingManagerTest.java
new file mode 100644
index 0000000..609809f
--- /dev/null
+++ b/remoteauth/tests/unit/src/com/android/server/remoteauth/ranging/RangingManagerTest.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.remoteauth.ranging;
+
+import static android.content.pm.PackageManager.FEATURE_UWB;
+import static android.uwb.UwbManager.AdapterStateCallback.STATE_ENABLED_INACTIVE;
+
+import static androidx.core.uwb.backend.impl.internal.RangingCapabilities.FIRA_DEFAULT_SUPPORTED_CONFIG_IDS;
+import static androidx.core.uwb.backend.impl.internal.Utils.CONFIG_PROVISIONED_INDIVIDUAL_MULTICAST_DS_TWR;
+import static androidx.core.uwb.backend.impl.internal.Utils.CONFIG_PROVISIONED_MULTICAST_DS_TWR;
+import static androidx.core.uwb.backend.impl.internal.Utils.CONFIG_PROVISIONED_UNICAST_DS_TWR;
+import static androidx.core.uwb.backend.impl.internal.Utils.CONFIG_PROVISIONED_UNICAST_DS_TWR_NO_AOA;
+
+import static com.android.server.remoteauth.ranging.RangingCapabilities.RANGING_METHOD_UWB;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.uwb.UwbManager;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.google.uwb.support.fira.FiraParams;
+import com.google.uwb.support.fira.FiraSpecificationParams;
+import com.google.uwb.support.generic.GenericSpecificationParams;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.ArrayList;
+import java.util.EnumSet;
+import java.util.List;
+
+/** Unit test for {@link RangingManager}. */
+@RunWith(AndroidJUnit4.class)
+public class RangingManagerTest {
+    private static final List<Integer> TEST_UWB_SUPPORTED_CHANNELS = List.of(8, 9);
+    private static final FiraSpecificationParams TEST_FIRA_SPEC =
+            new FiraSpecificationParams.Builder()
+                    .setSupportedChannels(TEST_UWB_SUPPORTED_CHANNELS)
+                    .setStsCapabilities(EnumSet.allOf(FiraParams.StsCapabilityFlag.class))
+                    .build();
+    private static final GenericSpecificationParams TEST_GENERIC_SPEC =
+            new GenericSpecificationParams.Builder()
+                    .setFiraSpecificationParams(TEST_FIRA_SPEC)
+                    .build();
+
+    @Mock private Context mContext;
+    @Mock private PackageManager mPackageManager;
+    @Mock private UwbManager mUwbManager;
+
+    private RangingManager mRangingManager;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+
+        when(mContext.getSystemService(UwbManager.class)).thenReturn(mUwbManager);
+        when(mContext.getPackageManager()).thenReturn(mPackageManager);
+        when(mPackageManager.hasSystemFeature(FEATURE_UWB)).thenReturn(false);
+        when(mUwbManager.getAdapterState()).thenReturn(STATE_ENABLED_INACTIVE);
+        when(mUwbManager.getSpecificationInfo()).thenReturn(TEST_GENERIC_SPEC.toBundle());
+    }
+
+    @Test
+    public void testConstruction() {
+        mRangingManager = new RangingManager(mContext);
+        verifyZeroInteractions(mUwbManager);
+    }
+
+    @Test
+    public void testConstruction_withUwbEnabled() {
+        when(mPackageManager.hasSystemFeature(FEATURE_UWB)).thenReturn(true);
+
+        mRangingManager = new RangingManager(mContext);
+
+        verify(mUwbManager).getAdapterState();
+        verify(mUwbManager).registerAdapterStateCallback(any(), any());
+    }
+
+    @Test
+    public void testShutdown_withUwbEnabled() {
+        when(mPackageManager.hasSystemFeature(FEATURE_UWB)).thenReturn(true);
+
+        mRangingManager = new RangingManager(mContext);
+        mRangingManager.shutdown();
+
+        verify(mUwbManager).registerAdapterStateCallback(any(), any());
+        verify(mUwbManager).unregisterAdapterStateCallback(any());
+    }
+
+    @Test
+    public void testGetRangingCapabilities() {
+        mRangingManager = new RangingManager(mContext);
+        RangingCapabilities capabilities = mRangingManager.getRangingCapabilities();
+
+        assertEquals(capabilities.getSupportedRangingMethods().size(), 0);
+        assertEquals(capabilities.getUwbRangingCapabilities(), null);
+    }
+
+    @Test
+    public void testGetRangingCapabilities_withUwbEnabled() {
+        when(mPackageManager.hasSystemFeature(FEATURE_UWB)).thenReturn(true);
+
+        mRangingManager = new RangingManager(mContext);
+        RangingCapabilities capabilities = mRangingManager.getRangingCapabilities();
+
+        List<Integer> supportedConfigIds = new ArrayList<>(FIRA_DEFAULT_SUPPORTED_CONFIG_IDS);
+        supportedConfigIds.add(CONFIG_PROVISIONED_UNICAST_DS_TWR);
+        supportedConfigIds.add(CONFIG_PROVISIONED_MULTICAST_DS_TWR);
+        supportedConfigIds.add(CONFIG_PROVISIONED_UNICAST_DS_TWR_NO_AOA);
+        supportedConfigIds.add(CONFIG_PROVISIONED_INDIVIDUAL_MULTICAST_DS_TWR);
+
+        verify(mUwbManager, times(1)).getSpecificationInfo();
+        assertEquals(capabilities.getSupportedRangingMethods().size(), 1);
+        assertEquals((int) capabilities.getSupportedRangingMethods().get(0), RANGING_METHOD_UWB);
+        androidx.core.uwb.backend.impl.internal.RangingCapabilities uwbCapabilities =
+                capabilities.getUwbRangingCapabilities();
+        assertNotNull(uwbCapabilities);
+        assertArrayEquals(
+                uwbCapabilities.getSupportedChannels().toArray(),
+                TEST_UWB_SUPPORTED_CHANNELS.toArray());
+        assertArrayEquals(
+                uwbCapabilities.getSupportedConfigIds().toArray(), supportedConfigIds.toArray());
+    }
+
+    @Test
+    public void testGetRangingCapabilities_multipleCalls() {
+        when(mPackageManager.hasSystemFeature(FEATURE_UWB)).thenReturn(true);
+
+        mRangingManager = new RangingManager(mContext);
+        RangingCapabilities capabilities1 = mRangingManager.getRangingCapabilities();
+        RangingCapabilities capabilities2 = mRangingManager.getRangingCapabilities();
+        RangingCapabilities capabilities3 = mRangingManager.getRangingCapabilities();
+
+        verify(mUwbManager, times(1)).getSpecificationInfo();
+        assertEquals(capabilities1, capabilities2);
+        assertEquals(capabilities2, capabilities3);
+    }
+}