Extended Wireless Range: Enjoy the convenience of a long-range wireless doorbell system with a reach of up to 300 meters, ensuring you never miss a visitor, whether you're in a large home or outside in the garden. Versatile Melody Selection: Customize your doorbell's ring with 38 different tunes, from traditional dings to pleasant melodies, suitable for various occasions and personal preferences. Easy Installation: Set up your new doorbell in minutes with a simple wireless installation process that requires no complicated wiring or tools. Button: Power supply mode: 12V 23A alkaline battery Transmitter power consumption: Less than 10mW Battery life: Estimated 20 times per day, approximately 1-2 years Wireless distance: About 300 meters in open areas, 20-50 meters indoors with obstacles Working temperature: -20C to 60C Transmission frequency: 433.92MHz Ring: Power supply mode: AC 100-240V 50Hz/60Hz Volume adjustment: 8-level volume adjustment Music selection: 38 chord music pieces Volume range: 25-85dB, tested at a distance of 0.5 meters with a decibel meter Working environment: Humidity less than 80% Working temperature: -10C to 60C Receiving frequency: 433.92MHz Plug Type: US Plug, applicable in Canada, India, Mexico, Thailand, Taiwan, the Philippines, and other countries using US standard voltage. Voltage: AC 110-240V Due to different batches, there may be slight variations in product labeling, which do not affect functionality. Color: White & Gold Material: ABS Package Contents: 1 x Doorbell Kit Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement allows for an error of +/- 1-3 cm.