ITEM NAME:5pcs Wireless Window Door Knob Hanging Burglar Alarm Sensor Battery Powered .like-pro-float .like-pro-price-both{clear: both;.Work as an anti-theft alarm, alarm siren up to 120dB. Easy to use and installation, no wiring needed (requires DC 6F22 9V batteries, not included); just simply hang the alarm on the inside of your door handle.
