Giới thiệu Hệ thống báo động chống trộm gắn cửa không dây pk

PK Magnetic Sensor Wireless Door Window Home Security Entry Burglar Alarm System
Features:
Suitable for home, office indoor use, but not for balcony where has insolation or rain.
Compact, wireless, easy to install.
Low power consumption, lasting one year. No need to change batteries frequently.
Keep the distance between device and magnetic shorter than 10mm, and arrow aims to each other.
Low power remind with LED indicator.
Super loud alarm of 105dB, scare thief away.

Descriptions:
Magnetic sensor, door and window motion detector.
Make sure one install in door/window, another one install in door/window frame, that to let them separate when the door/window is opening.
Powered by 2 pieces of AAA alkaline batteries. (Batteries are not included in the pack.)

Specifications:
Material: Plastic
Working Temperature: -10 ~ 60C
Working Humidity: below 80%
Size: approx. 8.5 x 4.3 x 1.5cm
Color: White
Net Weight: 37g

Package includes:
1 x Main Device
1 x Magnetic

Notes:
1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.
2. Due to personal measurement technique is different, there may be 1-3 mm error of the physical.Thank you!