For parents wanting to monitor multiple rooms or children, additional cameras can be added to the Summer Infant Baby Glow Video Baby Monitor and Projection Camera, up to 4 total. Multiple cameras function with an 8-second audio and video auto-scan feature allowing parents to keep an eye on each room. Summer Infant Extra Cameras are model specific and cannot be used interchangeably between systems. This Extra Camera is compatible with the Summer Infant Baby Glow Video Baby Monitor and Projection Camera, model number 29350. The model number can be found on the sticker on the back of the handheld unit or camera. Summer Infant Consumer Relations Representatives are available to assist you in finding the Extra Camera that is compatible with your system and can be reached at 1-800-BOUNCER.