diff --git a/include/hardware/ble_scanner.h b/include/hardware/ble_scanner.h
index 4ab0a77..c8f9ec2 100644
--- a/include/hardware/ble_scanner.h
+++ b/include/hardware/ble_scanner.h
@@ -121,6 +121,19 @@
 
   /* Read out batchscan reports */
   virtual void BatchscanReadReports(int client_if, int scan_mode) = 0;
+
+  using StartSyncCb =
+      base::Callback<void(uint8_t status, uint16_t sync_handle,
+                          uint8_t advertising_sid, uint8_t address_type,
+                          bt_bdaddr_t address, uint8_t phy, uint16_t interval)>;
+  using SyncReportCb =
+      base::Callback<void(uint16_t sync_handle, int8_t tx_power, int8_t rssi,
+                          uint8_t status, std::vector<uint8_t> data)>;
+  using SyncLostCb = base::Callback<void(uint16_t sync_handle)>;
+  virtual void StartSync(uint8_t sid, bt_bdaddr_t address, uint16_t skip,
+                         uint16_t timeout, StartSyncCb start_cb,
+                         SyncReportCb report_cb, SyncLostCb lost_cb) = 0;
+  virtual void StopSync(uint16_t handle) = 0;
 };
 
 #endif /* ANDROID_INCLUDE_BLE_SCANNER_H */
\ No newline at end of file