Description: 
100% brand new and high quality.

Feature:   
This product is easy to install, only need to paste the main and auxiliary parts on the cover and the chassis, or two windows, and align (leave about 5 mm gap). When someone unlawfully hits the cabinet or window (the main and auxiliary parts are separated), the alarm can send out a strong alarm sound to warn the intruder to leave. If you want to open the chassis, the door and window can be controlled by the switch.    
The product is small and exquisite, and easy to install. The double-sided adhesive provided can be easily installed on doors or windows.    

Specification:    
Prevent burglars from opening doors or windows    
Installation:Magnetically Controlled    
Alarm sound:90 dB    
Power supply:3×1.5V Battery (built-in)    
Weight:Approx 35g        
Host size:6x3x2cm/2.36×1.18×0.78in    
Quantity:1pcs/5pcs/8pcs/10pcs(optional)    

Application:    
1.Doors,windows,families,shops,businesses, etc.    
2.Internet cafes,computer chassis,anti-theft devices.    
3.Applicable to anti-theft of Internet cafes,residential buildings, offices,shop counters,etc.Built-in 90 dB alarm output,using 3 x 1.5 V LR44 button battery (included).    
4.It is suitable for burglar-proof of residential buildings,offices, shop counters,etc.    

Installation:    
1. Fix the main engine on the side of the door/window with double-sided sticker.    
2. Stick another bar door magnet to the door frame along the main prompt line in a straight line.    
3. When checking the settings, adjust the main switch to ON position.    
4. Open the door and see if the alarm sounds.    

Product Maintenance:    
1.Sound continuously or silently:(because the alarm is turned upside down in express delivery) Take apart the product, there are two close reeds on the inside edge, they will sound separately, contact will stop alarming. Contact and separation are controlled by magnetic strips of accessories. You can make the distance between the two reeds nearer or farther.    
2.Low voice:Turn on the switch always, run off the electricity and change the battery that will be ok.