DARHO Hot Sale Sensors Wireless Home Door Window Entry Burglar Alarm Signal Safety Security Alarm Switch Guardian Protector
100% Real Photo (Picture without any modification)
Picture ruler in centimeters

Descriptions:
1.100% Brand New and High Quality
2.Magnetic sensor switch detects entry
3.Ideal guardian against the unwanted intruder whether you are in or out, keep yourself and your property safe and security
4.Easily attach the main sensor on the door/window and attach the stick adjacent the main sensor on the door/window frame with the adhesive tape (included)
5.Handy ON/OFF switch: in the state of "ON", the sensor will emit the alarm signal as long as someone opens your door or window
6.Super loud 90 dB alarm
7.Powered by 3*1.5V LR44 button cell
8.main parts size:6X3X2cm,assistant size:5.4x1.3x1.1
9.siren Loudness:90DB
Features:
Easily mounted by adhesive tape to window or door.
Magnetic sensor switch detects entry protecting your home or office whether you are in or out.
Warning door/window sticker is supplied free in package.
Operating by 3 pcs.1.5VLR44 button cell.
Operating instructions:
1.Use the double-side adhesive tape to fix the main unit at the side of the door/window.Attach the bar magnet to door frame/window frame with the arrow aligning with the refrence line of the main unit.
2.Test the setup by swithing the system's switch to ''ON'' position of the main unit and see whether the alarm can be triggered by opening the door/window.
Package includes:
1 x Alarm Unit ( including bettery normal usage time of one year)
1 x Magnetic Sensor
Tips:
1.The rang non-stop or does not ring: (the reason is the alarm is shocked by the way, resulting in the inside of the iron clutch is not very sensitive, but the probability is very small) you can shake the alarm host, and repeat near, separated from the host and auxiliary machines for several times, and observe the switch whether intact, also you can knock the host and auxiliary machines.
2. If the voice is small, it because the electric ran on the way, change the battery is OK.
if it still can not use may be the the electric wire is broken on the way ,but it is almost impossible

