DSC kit 455 31FT IMPASSA Burglar Alarm System Set Consist of Control Panel- 1 no, Wireless Door Contact- 2 no & Wireless key fob - 1 no Supports 64 wireless zones and 16 wireless keys (without using a zone slot) Optional integrated HSPA (3G) cellular, internet or dual communicator Cellular signal strength read-out to optimize placement Built-in 2-way audio VOX and push-to-talk alarm communication via phone line and cellular 2-way is available only on IMPASSA 9057 Self-Contained Wireless Security Systemt 4 keypad 4 sirens 16 wireless keys Remote firmware upgrade via cellular/internet Easy wireless device enrollment process Template programming Full 32-character programmable labels Enlarged keypad buttons 5 programmable function keys Individual FAP keys 17 user access codes 500 event buffer False alarm reduction features (CP-01 Outdoor temperature display Label Library Compatible with leading edge interactive services supported by DSC SCW9057 model only