... consumption,no wiring required. GTS-112 DOOR&WINDOW ENTRY ALARM:safety guard brings safety to your home when you ... . You,of course,need a reliable product in its quality, design and durability.The safety guard meet your requirement ... energy,durable,and has satisfactory tone and volume.The quality has been appraised by experts.This provides ypu a ... ,Measurement:0.027CBM (GTS-112) DOOR&WINDOW ENTRY ALARM