1. LCD screen & Touch keypad 2. Quad-band(850/900/1800/1900MHz) 3. Wireless siren and Doorbell function 4. ADEMCO Contact ID NEW GSM alarm system with LCD display and Touch keypad 1. With Touch keypad, back-up blue light, and lattice LCD display;2. Original New Quad-band (850/900/1800/1900MHz)Module, Suitable for everywhere in the world;3. Buit-in Chinese and English Version;4. 99 wireless zones; ...