Garmin BC 30 Wireless Backup Camera Works with most Garmin Drive, nuvi, and dzl GPS navigators (sold separately) View whats behind your vehicle when in reverse; BC 30 backup camera view shows right on the compatible navigators display If desired, wire to constant power and toggle easily between camera and navigation modes Wirelessly transmits video up to 45 feet. Wireless transmission type : 2.4 GHz ISM radio band Rugged enough to withstand harsh weather