Sell door/window's alarm

Description

ITEM:BS-DA**1 Function: Only tear glue paper on the back of alarm, make they paste separately on the two side of door or window. And align it. (Have space between 1 to 5 mm) When use it, switch it on the location of “ON”, it begin to work. When anybody want open the door or window without host permission(main and sub one separately), it will go on by the sound pressure of *0dB to scare the thief ,meanwhile mention you to check out .after you switch to “OFF”, or close the door or windows, the alarm stop. It is controlled by switch when you open the Door or window.(3*1.5 LR*4 button cell 2year available, can replace after use out) Feature: High decibel safety alarm Crime arrival notification Thin magnetic attachment with arrow Easy installation requiring no wire Used with windows and doors at home, offices and in factories Safe and convenient Packing: Suction Plastic Carton measurement(cm) *6.6×*5×*2 Quantity of package: **0 pcs/ctn