Round plastic remote doorbell with the exact "same frequency with different code" technology, eliminating user worry about interference from each other, Plug-and-play fashion. Round plastic remote control doorbells do not have to turn to the professionals and installation workers, eliminating the trouble and expense of cable-mounted dual-tone stereo speaker, made clear, sweet voice, is especially suitable for homes, offices, factories, tourist industry and other places. Round plastic remote controlled doorbell made of high quality plastics and electronic components, white and blue colors, rounded design. Round plastic remote control doorbell with blister card packaging, Qty-120/piece, quantities of 1 piece.