The 1CERMC795DC is an extra remote control for our Strobe Wireless Security System (model # 1CESSS300DC).  This allows other family members or employees access to your home or business. With the included key ring you will always know where the remote is located. A 12 volt battery is required (included). Dimensions are 2 1/2 inches x 1 inches x 1/2 inches not including the key ring.