Wireless Sensor Door Window Home Security Entry Burglar Alarm System

Features : 

1. Suitable for home, office indoor use. 
2. Compact, wireless, easy to install. 
3. Super loud alarm of 100dB, scare thief away. 
4. Transmission Range : about 50m. 
5. Door and window motion detector. 
6. Powered by 3 x AG13(LR44) button cell batteries(Included). 
7. Size : 7cm(Dia. ) x 8mm , small and exquisite ~

Operation : 
1. Slide the ON/OFF switch to ON
2. After 5 seconds of LED Flashing, a short beep will sound, the Ultra-slim Window Alert is now armed
3. The alarm will sound for 30 seconds upon detecting window vibration or shaking. The Alarm will return to armed status after activation
4. You can stop the alarm at any time by sliding the switch to OFF
5. If the alarm sound becomes weak, the battery needs to be replaced.