AMAZING162 High Quality Wireless Doorbell Cordless Doorbell with Remote Control for Home Office 1 Remote Control Button with 1 receiver Wireless battery operated doorbell system for easy portability - Both the Transmitter and Receiver are battery operated 4 level Adjustable volume Control  adjust the volume to your personal liking Chime requires three size AAA alkaline batteries (not included) and push button is operated by one 23A 12V Alkaline Battery (included Both The Chime and Push Button Have Led Lights to Know That When the Bell Sounds Chime Mounts with 2 Screws (not include) and can simply be placed on any location - Push Button Ringer includes adhesive back for easy mounting Prior to first use remove protective film from battery in remote