The Facet chime is suitable for domestic and commercial use. It can be powered either by batteries or by using a transformer. The Facet chime can easily be extended to add an additional chime or bell push for a back door option. Note: this is a Wired Door Chime only (not a kit)

Batteries	Dimensions
4 x R14/C batteries D753 or D780 transformer 80dB @ 1m	171 x 105 x 49mm

Requires Transformer or 4 x C size batteries. (NOT SUPPLIED)