For use with front door, back door or customer service area. Water-resistant ringer may be used outdoors or indoors and attaches easily with foam tape or screws, both included. Wireless receiver operates up to 200 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: 1.38"; Depth: 0.75"; Height: 3.5".