WJLING Motion Sensor Alarm System, Wireless Home Security Driveway Monitor Alarm

It detects movements and sends a signal to the receiver from up to 328 feet (100m) away. Alerts you when someone enters your driveway, walking path, doorway, or business, such as visitors, vehicles, intruders, animals, or kids coming or going. Use it to monitor any area inside or outside, it's wireless so you can place it anywhere in the house or even take it from room to room. It weighs 7.76 ounces (.22kgs) and can be used as a doorbell the motion sensor will automatically interact when someone comes.