About this item Easy installation: no need of drill, just stick to door/window by using adhesive Replaceable battery: once battery is weak just replace them by opening cover Sharp ear piercing sound: inbuilt siren give sharp siren sound as soon as door/window gets opened Noise Level : 80 dB Product Dimensions : 10L x 10W x 5H Centimeters Country of Origin : China Item part number : NS-Security sensor-4 ASIN : B07KZQ94QL
