Features:
1. Loud alarm: up to 120dB sound, louder than common door alarm, providing deterrence to thieves;
2. Easy to install: the double-sided adhesive provided is easily mounted on the door or window, and the main parts are affixed to the door and frame or two windows respectively, and it works;
3. Long lasting power supply: 1 X 9V battery (not included)

Specifications:
Size: 10 X 5 X 2.2cm/3.94 X 1.97 X 0.87″
Wire length: 13cm/5.12″
Product weight: about 59g
Material: ABS plastic
Power supply: a 9V battery (not included)
Product color: white
Scope: doors, windows, factories, companies, families, warehouses

Instructions for use:
Small and exquisite, it is easy to install. The provided double-sided adhesive makes it easy to install the alarm on the door or window. 
Simply attach the primary and secondary attachments to the door and door frame, or two windows, and keep the auxiliary arrow aligned with the side mark of the main unit (leaving about 5mm ). 
Once thief breaks the door or pries the window trying to steal (at this time, the separation distance of the main part and auxiliary unit is more than 10mm), the alarm will issue more than 120 dB alarm sound to scare thieves and to remind the owner and the people around the thief. When you want to open the door by yourself, it can be controlled by the switch (ON / OFF).