?Wide area coverage?The wireless weather resistant motion sensor can be used to monitor&protect your outdoor/indoor property. It works through thick walls, trees and metal siding buildings. It will not interfere with other equipment in your home or those of your neighbors, ensures that you will never miss any visitors, even if you are several rooms away. ?Easy and Fast Installation?This monitor system is fully-expandable, with plug-and-play sensors that can be set up within minutes. The sensors can be mounted to walls, fence posts, trees, or any other surface, for full coverage of your property. ?3 Alert Options & 38 Chimes?The wireless outdoors sensor features 3 Alert Options (Audio Chimes/Flashing/Chimes and LED), 38 chimes and 3 volume levels from (25db to 80dB) to suit your needs. ?Wireless Plug-in Receiver?The portable wireless plug-in receiver plugs into any standard outlet. The sensor uses 3 AAA batteries (Not Included). Infrared sensor detects motion and sends a signal to the receiver. Detection time delay in between motion sensor alerts is configurable from 15 seconds to 30 seconds, just place the sensor at the entrance to your driveway and the receiver inside your home. ?Waterproof & Dustproof?Best wireless driveway alarm IP65 dustproof and waterproof; working temperature ranges from -4 °F-140 °F; withstands various harsh weather conditions; wireless driveway alarm for home, apartments, school, villas, offices, warehouses, hotels, factories, hospitals and more.