The Swann Wireless Door Chime with Stylish Black Finish is a fully wireless unit that allows you to set your doorbell tune from up to 32 chimes. Simply push the doorbell button and hear the melodic chime. The speaker unit operates on 3 x AA batteries (not included), and can be placed virtually anywhere within 165' (50 m) of the push button doorbell unit. All the mounting hardware that you'll require to set up this unit is included in the pack.
Wireless Door Chime with Stylish Black Finish
23 A Battery for Doorbell Unit