The Utilitech Wireless Doorbell Kit Sensor with 2 Chimes in White is a battery-operated door chime suitable for use in homes and shops. The rectangular-shaped sensor features a matte white finish and is made of plastic. With a wireless connectivity option and the ability to play a melody/tune, this doorbell is both functional and stylish. The kit includes 3 batteries for operation and a portable bell/chime feature for added convenience. Ideal for those looking for a reliable and easy-to-install doorbell solution.