The wireless doorbell offers a versatile tool to get your attention at the front door, back door or customer service area without the cost and hassle of getting a wired bell. The waterproof button ring can be used outdoors or indoors and attaches easily with screws or foam tape (both included). The wireless receiver works up to 250 feet from the doorbell and hangs easily on nails or hooks (not included). A pleasing ding-dong tone is one of 32 ring options. The ring tone can be changed by simply pressing a button on the back of the receiver. The doorbell is code-paired to a chip inside the receiver, so multiple doorbells can be used in close proximity, but only the desired receiver will ring. The FCC certified doorbell is powered by three AA batteries (sold separately) plus one 12V A23 battery (included). Product Type: Doorbell Product Type: Doorbell Manufacturer Part Number: 57910 Packaged Quantity: 1 Each Connectivity Technology: Wireless Connectivity Technology: Wireless Manufacturer: Tatco Products, Inc. Product Name: Wireless Doorbell Brand Name : Tatco Brand Name: Tatco Country of Origin: China