Features: Easy to install and use: Easily plug the receiver into an electrical outlet. Installation is as simple as plugging it into the location where you need to hear it and placing the button where you want someone to press it. Long operating range: Open-area working range of up to approximately 600 feet/200m ensures you hear the bell and answer the doors in time. Whether you're going to several rooms, another floor, the garden or the kitchen, you'll alway be able to easily know you will not miss a visitor when someone calls from outside. 36 melodies and adjustable volume: The wireless doorbell offer 38 ringtones to suit your taste, you can make Christmas doorbells at Christmas time and more. levels of volume to meet your need for different occasions. Suitable for home, apartment, classroom, office, villa, and so on. Specifications: Material: ABS Color: Black/White Doorbell: Working Voltage: 80-260V Operating Current: 0.1ma Operating Frequency: 433MHz Volume Adjustment: 4-speed Adjustment (with mute function) Reflector: Operating Voltage: DC12V 23A Operating Current: <25ma Plug Type: EU Standard Size: Detail Sizes in the Pictures Package Includes: 1 Set Door Bell Kit note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.