oal_status_t avrcp_ct_prev_track(bt_address_t *device_address);
/**
+ * @brief Play volume up on the connected remote device.
+ *
+ * @return OAL_STATUS_SUCCESS on success, otherwise a non-zero error value.
+ * @retval #OAL_STATUS_SUCCESS Successful
+ *
+ * @pre A2DP Sink should be connected with a device.
+ * @pre AVRCP connection should exist with the device.
+ */
+oal_status_t avrcp_ct_volume_up(bt_address_t *device_address);
+
+/**
+ * @brief Play volume down on the connected remote device.
+ *
+ * @return OAL_STATUS_SUCCESS on success, otherwise a non-zero error value.
+ * @retval #OAL_STATUS_SUCCESS Successful
+ *
+ * @pre A2DP Sink should be connected with a device.
+ * @pre AVRCP connection should exist with the device.
+ */
+oal_status_t avrcp_ct_volume_down(bt_address_t *device_address);
+
+
+/**
* @brief Set media player properties to target device
*
* @remarks Target device will receive media player properties.