[Led Indicator & 38 Melodies]: You can select 1 of 3 ways of being alerted (o Chimes/Flashing/Chimes and LED) and 3 volume levels from 25-80dB. You can also select from 38 Ringtones with Bright LED Light. [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, which is great for homes, offices, garages, yard and shopping malls, for full coverage of your property. [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. [Long Distance Wireless]: Working range up to 328 feet (100 meters) between receiver and transmitter allowing you to place it a good distance. It can be alerted to visitors, notice door opening, scare off unwanted intruders, or even know when your children have accessed restricted areas. [Wide Range Of Application]: Perfect for front doors, hallway, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion. Also great to alert business owners that are working in the back, or out of sight, to customers entering their store.(PIR motion detector is not waterproof,so it's covered and protected from the sun and rain.) Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. color:White Material:plastic Package Contents: 3 x motion sensors 3 x receiver Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.