NuTone LA206WH Contemporary Wave Design Portable Wireless Door Chime, White 6-Inch wide x 7-5/8-Inch high x 2-1/4-Inch Deep Contemporary wave design Receiver mounts on wall or can be placed on table Reliable operation and great sound Installs in just minutes - no wires to run Receiver requires 4 D batteries (not included) 6-Inch wide x 7-5/8-Inch high x 2-1/4-Inch deep