Friedland D117 Ding Dong Fixed Wall Mounted Chime Manufacturer: Friedland Product Range: Fixed Wall Mounted Chimes Manufacturers Part Number: D117 - Ding Dong Features and Benefits: Extensive choice of sounds and designs Power can be provided either by batteries or from an external transformer 2 notes 80dB @ 1m Details 4 x R14/C batteries (required) D753 or D780 transformer (required) Dimensions 171 x 105 x 48mm