The Greenbrook DP010A-C Wired Black Doorbell Push Transmitter is designed for use with all hard wired door bell systems by connecting via bell wire and mounting to surface with the provided screws. This simple yet sturdy product is ideal as a replacement for an existing Door Bell Push or as an additional switch to your existing Doorbell Chime System. This bell push can also be used with a majority of wirefree doorchimes when used in conjunction with a DW070AN-C wirefree transmitter. Easy to install. Black body with White button. Non-Illuminated Button. 1-24V 2A. Dimensions: 60mm(Height) x 30mm(Width) x 20mm(Depth). Fixing screws included. Instruction Manual Comes complete with a 12 month manufactures warranty. This product is ideal for use with the popular Galaxy hard wired bell sounder by Greenbrook which has the traditional Ding-Dong.