B11 Alarm

B11 GSM/PSTN Dual-Network Alarm System. With a built-in LCD and touch keypad, Chuango B11 packs serious security functionality into a sleek panel with an elegant piano finish. Simply insert a regular working 2G SIM card into the B11 and plug in any PSTN fixed landline, and you double the security for your home and loved ones with system redundancy.