Garmin BC40 Wireless rear view camera used with 2 AA batteries (lithium batteries recommended) and quickly and easily mounted by snapping into the supplied license plate holder Displays the image of the BC40 camera on your compatible Garmin navigation device on compatible Garmin navigation devices Shows what is behind the vehicle with a wide-angle video image Robust and weatherproof (waterproof to IPX7) for use in a wide range of conditions Voice command control when coupled to a compatible Garmin navigation device