Wsdcam DIY Home Security System, Wireless Window Door Alarm...
The wireless window sensors will give you peace of mind 4-in-1 MODE - 1. General Alarm (alarm stop if door closed); 2. Constant Alarm (constant alarm even door closed); 3. Closing-door Alert (sound “Di..Di” from 0dB to 110dB); 4. Door Open Chime ...