The sound of car alarms going off at the touch are common enough. How do these car protection systems detect intrusion? In a car alarm system, a siren is connected to a few sensors to ensure that as ...

This motion detector alarm can detect a moving person from a distance of 1 meter. It uses a dual IR Transmitter-Receiver module HOA1405. When the sensor detects the reflected IR rays, alarm will sound ...

Wireless Caregiver Pager include 1 Portable Receiver and 1 Motion Sensor. Signals connected receivers when motion sensor is detected.Easy to monitor your family getting out of bed or leaving the ...