Plastic remote control doorbells, wireless installation design that is simple, flexible, save installation trouble and expense, and save money. without prejudice to the decoration and beautiful. 1. up to 100 meters, and meet the needs of all kinds of residential and high-rise apartments flats. 2. with electronic step-down of the insurance system is used, rejecting dangerous transformers (for a long time, easy heat short-circuit ignited), you can ensure security. 3. on a European-style, sleek streamlined design of compact, ultra small, elegant, crafted to enhance your home. 4. built-in stereo speakers, makes clear, sweet voice, is especially suitable for homes, offices, factories, tourist industry and other places of use, wide range of uses. 5. strong anti-interference ability, repetition rate of less than one-eightieth.