... villa. Hope you will like this simple alarm system.LS-GSM-100 Alarm Functions:1. Fashionable and ... indicator, it shall be on when entering the system setting.SIGNAL:Wireless signal indicator, it shall be ... indicatorArea 3:Touch keyboard: the key of the system is touch screen of resistance-type, which requires ... .92 Mhz optional;,2262 / 4.7MΩGSM System:850/900/1800/1900MHz are availableBackup Battery:NI ...