101 Zones Ja-10bgsm Wireless GSM Home Security Alarm Fire, Gas Leak, Door Lock, Living Room, Window, Balcony,and Perimeter Burglar Alarm System After the normal boot, the device is in the standby state, remote locking key gets armed, while the unlock button is disarmed GSM (USIM) card should be used; Does not support 3G, 4G Help, Fire, Gas Leak, Door Lock, Living Room, Window, Balcony,and Perimeter Alarm; Supports an external intercom speaker; The main device can dial alarm calls to 15 preset phone numbers. With dual network of GSM + telephone cable, the System is more secure and reliable. With the One-Key-Control function, you can conduct Away Arming, Home Arming, Remote Control Arming or Off-site Telephone Arming.