Door sensor is a safety alarm device, which is used to detect whether doors, windows, drawers, have been opened or moved illegally.
PIR motion detector (passive infrared sensor) is designed to detect human movement indoors.
Wireless Smart Doorbell Kit for Houses, Smart Home, Home Automation Use
Wireless Smart Doorbell with Several Melodys Can be Selected
This SOS Remote Control can be used as a wireless doorbell transmitter, which is widely used in access control, security alarm devices, home automation, motor switching control, lighting control, etc
This SOS remote control can be used as a wireless doorbell transmitter, which is widely used in access control, security alarm devices, home automation, motor switching control, lighting control, etc.
433/315 MHz 2/4/6/8 Keys Learning Code Remote Control, for access control & industrial control use
