Emergency alarm system with LED light 1.SMS command 2.10seconds voice message 3.24 defense zones 4.CE Emergency alarm system with LED lightmodel name:REH320Advantage features:1. Easily to install,do It by yourself;2. Easily to program,one sms can program all the commands;3 . 6 phone numbers, call&sms number is intergrated in one mobile phone number;4. 20 wireless and 4 wire zones, every zone can ...