Easy and fast sensor The infrared sensor detects movement and sends a signal to the receiver. Choose from 38 ringtones with bright LED light. Wireless Plug-in ReceiverPortable plug-in receiver plugs into any standard outlet. The sensor uses 3 AAA batteries (not included). The detection delay between motion sensor alerts is configurable from 30 seconds. Simply place the sensor at the entrance to your driveway and the receiver inside your home. Extensive Working RangesWork tables up to 230 feet (70 meters) between receiver and transmitter allowing you to place it a safe distance from the receiver to alert you to the arrival and departure of family members, unsolicited solicitors or attorneys, or anyone visiting your home or your business Wireless installationThe sensor is wall mountable, don't worry about installing the problem. Widely usedIdeal for office doors entrance, window frames, driveways, walkways and anywhere in the house you want to be alerted. Also excellent for alerting business owners who work behind or out of sight, to customers entering their store. Color:2+1 Eu Specification: Material: plastic shell Receiver working voltage: 110V-240V Transmitter working voltage: 4.5V 3x AAA batteries (not included) Working range: up to 70 meters Infrared detection distance: 3-7 meters Music source: 38 different songs Volume adjustment: high, medium, low (60~105dB) Voice: Can adjust with light and voice / with light and without voice Plug: EU Plug Pattern: 1: 1 receiver and 2 transmitters 2: 2 receivers and 1 transmitter (optional) Transmitter: approx. 80*59*45mm / 3.15*2.32*1.77in Receiver: approx. 76*80*33mm/2.99*3.15*1.30in Weight: approx. 226-237g How to use: 1. Place the correct batteries in the detector. Make sure the batteries have been placed correctly. 2. Properly install the detector near the front door, window frame, driveway, walking path, yard or any other place 3. Then turn on the receiver and set the volume to high or low position. 4. The remote sensing system now works with infrared sensing technology. 5. Place the receiver in an easily accessible place. 6. When the detector detects movement, the receiver emits an audible sound and the LED indicator flashes. 7. Please wait 30 seconds after activating detective and receiver to activate. 8. Please install both units 3 feet off the ground for best performance. Package Included: 1*Wireless Door Transmitter and Receiver Set with Accessories