Comprehensive Security: This of wireless vibration sensors is designed to detect break-ins through glass doors and windows, ensuring robust home security. Adjustable Sensitivity: Features five levels of sensitivity to accurately respond to different impact forces, minimizing false alarms. Wide Compatibility: Compatible with any 433MHz alarm system, including panels and Wi-Fi gateways. Note: Cannot operate independently. Easy Installation: quick setup without needing tools. Enhanced Connectivity: Effective transmission distance of up to 100 meters outdoors and 50 meters indoors, ensuring reliable communication with the alarm host. Installation and Adjustment: To adjust sensitivity, press and hold the SET button until the LED flashes, indicating the current setting. Press again to cycle through the five levels, from minor vibrations to strong impacts. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Colour:Black Material:ABS Package Contents: 3 * Wireless Vibration Glass Break Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.