Specifications: 1 receiver, 1 infrared sensor. Can be powered by Micro-USB, can also be charged with 7 and 5 batteries (product does not include batteries) Material: The product is made of plastic and copper, which is not easy to damage and has a long service life The receiver is equipped with color LED lights with adjustable brightness, which can distinguish different entrances with different colors, more intelligent! Wide operating range: Outdoors, the operating range between receiver and transmitter is up to 918 feet (280 meters). There are a variety of different ringtones, as well as welcome sounds in five languages, including Chinese, English, Japanese, Korean and Thai, and a new vibration reminder function. It can detect movement in the surrounding area - driveways, front porches, gates, homes, sheds, offices, sidewalks, swimming pools, shops, etc. It also applies to front doors, window frames, mailbox alerts, walking paths, pet monitor alerts, and anywhere else in your home that you want to alert to movement. And sends an alert to the connected receiver.