GSM burglar home alarm SA-GSM1. MAIN FEATURE:1. it can auto dial 6 groups of pre-set phone numbers. 2. send you SMS when the accessories are triggered. 3. you can send SMS to control the main panel through mobile phone. 4. you can check the pain panel condition use SMS.2. Standard Unit: one English GSM main panel, one keyboard panel, one back-up lithium battery, two remotes, one advanced PIR, one door sensor , one adapter, one mini siren .GSM Frequency:900/1800/1900MHZ,