... Back up battery 4.Home alarm with big lcd,simple menu LCD home alarm system Advantage:Needn't pay monthly ... from us. Features of alarm system:1).Touch keypad; LCD displays Date,Week, Time, and System Status 2). ... (Optional) 11).Support CID uploading to CMS(Center monitoring Station). 12).Landline broken off alarm, auto priority to occupy ... ,smoke alarm,wireless strobe siren,PIR detector,outdoor siren..