... , gas detector etc., can monitoring several kinds of alarms. Alarm receive status: Preset 3 groups SMS, 3 groups MMS, ... Household gas leak, fire and other accidents,and give remote alarm Installed at the door, window, balcony door, important drawers, ... Wholesale / retail market with stalls business All kind of small and medium-sized enterpriseStandard package:main panel “X2”1pcRemote controller1pc2G ...