Chuango - Vibration Detector - White

315MHz frequency, wireless transmission is more than or equal to 80 meters in open place, When the WD-80 detects vibration: it will send alerts to the alarm system for appropriate action. 3 Sensitivity Levels: There are 3 sensitivity levels that can be adjusted to fit your needs or environment. Ideal: It is ideal for safes, drawers, doors, windows and other places where a secure footing can be established. Super quality material for durable use: Low-consumption design, which can make it work long time. Note: It can only work with 315MHz alarm system, can't work with 433MHz alarm system. ,