Features: The Infrared sensor detects the motion and sends signals to the receiver. Switch among 38 kinds of ringing sound with bright LED Light. The portable wireless plug-in receiver can be plugged into any standard socket. And the sensor is wall mountable. The Working Range is up to 300 feet (70 meters) between the receiver and the sensor, allowing you to place it separately in a long distance. Ideal for front doors, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion. Great to alert storekeepers that are working in the back, or out of sight, when customers entering their stores. Specifications: Working Voltage of the Receiver: AC 110V-240V Working Voltage of the PIR Sensor: 4.5V Battery of the PIR Sensor: 3 * AAA batteries (Note included) Music: 38 different songs optional Working Range: Up to 70 meters Infrared Sensing Distance: 3-7 meters Color: White Receiver size: 8.0 * 7.6 * 3.3cm / Receiver Weight: Approx. 62g / 2.18oz PIR Sensor size: 8.0 * 5.9 * 4.5cm / PIR Sensor Weight: Approx. 46g / 1.62oz Package Size: Approx. 14.2 * 9 * 8.7cm / 12.36 * 8.66 * 4.88in Package Weight: Approx. 227g / 8.00oz Package List: 2 * PIR Sensor 1 * Receiver 2 * Sets of Wall-Mount Sensor Clips 1 * User Manual