Driveway Patrol Garage Sensor Wireless Alarm Doorbell EU Plug 1 to 1

Features:
It has a special design and beautiful appearance.
The function of volume adjustment: There are three kinds of volume (high, middle, low) for choice
Simple operation, you can put it anywhere you want.
Infrared sensor detects motion and sends a signal to the receiver.
Suitable for floor houses, offices, factories, hotels, etc.
Wireless installation, just place the sensor at the entrance.
Send audible chime sound, alerting you that somebody is approaching.