iRV Technology iRV36 car stereo is the official replacement of IRV29, exactly the same size as IRV29 so it is a direct replacement.This car audio receiver supports APP/HDMI in & out /AM/FM/NFC/Clock,providing digital 2.0 Surround Sound-optical SPDIF Audio Input.Via NFC label this car radio can complete a quick BT pairing.This RV radio has USB port uses on 5V charging for Android&Apple devices.