Garmin 010-12242-20 Add-On Camera & Transmitter for Bc (TM) 30 Backup Camera Wirelessly transmit and display rearview footage from your BC 30 camera on your compatible navigation device's display with this additional backup camera and transmitter cable. Up to 4 cameras may be used together in 1 system, for multiple camera views In the Box: BC 30 wireless backup camera with mounting bracket, Wireless transmitter Professional Installation Recommended