Raoes IR Wireless Door Bell Welcome Alarm Chime Motion Sensor Detector Entry Bell (2 Transmitter + 1 Receiver)
This is sensor doorbell not remote control.Simple operation, attaching it anywhere you want
Infrared sensor detects motion and sends a signal to the receiver
Wireless installation, just place the sensor at the entrance.
Alerts you when someone enters your driveway, such as visitors, vehicles, intruders, animals or kids
Power: Sensor 9V battery(Not Included) /Receiver 2 AA battery (Not Included).The high volume of this chime designs is not very loud, so if you need a loud chime please choose carefully.Thanks