Sanjie Window Alarm Magnet Sensor - 3 Pack

This is a 3-pack of Sanjie window and door alarms. They're silver and black with a loud 125dB alarm or a 100dB chime. The alarm triggers when the magnet separates more than 0.4 inches. PS:This is the final sale. (No exchanges or returns)100% brand new product. Excellent price. No bargaining accepted. First come, first served．