You can install a doorbell anywhere in your house with the Battery-Operated Wireless Chime. Mount the battery-powered doorbell at your front door, and when a visitor presses it, it transmits wirelessly up to 100 feet to the receiver, which can be plugged into any 120-volt outlet. Ideal for use in your workshop, laundry room, garage or patio, the Battery-Operated Wireless Chime allows you to hear the doorbell chime ring out in any room in your home. The chime is powered by three AA batteries (sold separately). The transmitter's battery is included. -Battery-powered door chime announces visitor anywhere in the home-Wireless transmitter mounts outside your front or back door-Up to 100-foot range allows for flexibility in placement-Dimensions: Chime: 4 3/8" x 3 1/8" x 1 1/4"; transmitter: 3 1/4" x 7/8"