Wireless 7-color Light Changeable Music Doorbell Chime For Home, Elderly &. Introducing the ZOCORFID Wireless Doorbell, a Convenient and Modern Solution for Your Home or Office. This Doorbell Features a Sleek Design and Offers a Seamless Installation Process, Perfect for Any Entrance. With an Impressive Receiving Range of over 100 Meters, You'll Never Miss a Visitor Again. The Doorbell Operates on DC4.5V Power, Using Three AA Batteries (not Included), Ensuring an Efficient Energy Consumption with an Operating Current of Less Than 200mA. This Wireless Doorbell Boasts 28 Musical Chords to Choose From, Allowing You to Customize the Sound to Your Preference. Additionally, the Volume Can Be Adjusted Across 8 Levels, Ranging from 0dB to 85dB, to Suit Any Environment. Key Features: - Wireless Doorbell System - Operating Voltage: DC4.5V (3x AA Batteries Required) - 28 Customizable Musical Chords - Volume Adjustable from 0dB to 85dB (8 Levels) - Receiving Range: over 100 Meters - Easy Installation - Compact Dimensions: Button (8x5x2.2cm), Bell (10.2x6.7x3.0cm) Note: Batteries Are Not Included. Avoid Purchasing a Single Bell..