Wireless DoorbellFor use with front door, back door or customer service area. Water-resistant ringer may be use outdoors or indoors and attaches easily with foam tape or screws, both included. Wireless receiver operates up to 250 ft. away. Pleasant ding-dong tone is one of numerous ring options. Operates on 3 AA batteries, not included, plus one 12V A23 battery, included. Color(s): Bone; Width: 1 3/8"; Depth: 3/4".