Product information: Power supply mode: The transmitter uses batteries, and the receiver uses AC power Power supply voltage: 110V-220 (V) Ringtones: 58 chords Power consumption: &lt;10m (W) Type: wireless doorbell Size Information:<img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/f40e5f25-89f0-4b0f-ab85-5c3a2eb49941.png" style="max-width:100%;" width="456" height="314.08"> Packing list:Wireless door bell*1<img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/240ffe16-f26c-4e1b-98cc-76b2176b9e61.jpg" style="max-width:100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/c75120a7-e28d-45fc-ac4e-90425f55f362.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/afd9d4f8-aece-4d8f-93cc-b9eb469e0ade.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/dde18d48-8e06-48a3-8b37-299404a577e2.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/849d223b-c46f-43dd-acdb-f35a42fb5f6f.jpg" style="max-width: 100%;">

Color: White, style: Transmitter and2 receivers-US, power: - Loud Home Smart Remote Control Wireless Doorbell