White plastic doorbell wireless installation design, reducing the trouble and expense of installation and accurate "RF ISO code" technology from interfering with each other, not aging, fading and corrosion of materials and so on. White plastic doorbell sound built-in dual stereo speakers, sound crisp, reference wholesale price negotiable, minimum order quantity is 1 or more, Qty 60 kcal/pieces. White plastic door bell is packed in blister card, equipped with Bell and batteries, and is constructed using high quality industrial plastics into, for homes, restaurants, factories, and other places of use.