... Back up battery 4.Home alarm with big lcd,simple menu LCD home alarm system Advantage:Needn't pay monthly monitoring charge! ... buy from us. Features of alarm system:1).Touch keypad; LCD displays Date,Week, Time, and System Status 2).Supported Languages: Chinese\ ... Host Frount Side:Optional Accessories for the home system include remote control,door sensor,panic button,smoke alarm,wireless strobe siren, ...