The Aguri mag mount reversing camera is completely portable and is ideal if you change your vehicle or trailer regularly. It incorporates a built-in rechargeable battery and is magnetically mounted on to the rear bumper or other flat metal surface at the rear of your vehicle. The image of the area behind your vehicle is then transmitted to your Aguri sat nav using Wi-Fi and a free app installed from the Google Play store. Park safely and with confidence. No installation required!