... for using,wide range and far distance SpecificationsWireless Burglar Alarm System Infrared Remote Control Alarm 1 Mini shape 2.120db loudly ... 3.Simple to operate & easy to insetWireless Burglar Alarm System Infrared Remote Control Alarm1 Mini shape2.120db loudly 3.Simple ... near the heat source, such as hot and cold air outlet, air vent, heater, air cooler, etc., to avoid the straight on the ...