Over 1000ft Coverage :The KERUI Wirele Doorbell has a range of over 1000ft, ensuring that you can install it anywhere on your property without worrying about signal strength. Waterproof Push Button :The push button for the KERUI Wirele Doorbell is waterproof, making it easy to install in any weather condition. 57 Chimes and 110dB Loud Sound :With 57 chimes and a loud sound of 110dB, the KERUI Wirele Doorbell ensures that you never mi a visitor. Smart Home Integration :The KERUI Wirele Doorbell is compatible with smart home systems, allowing you to easily integrate it into your existing home automation setup. KERUI 57 Chime Wirele Doorbell Waterproof Wirele By Alarm Contact Sensor Doorbell Main Features: 1. 57 different music tones optional.2. Memory function, never lose last set whatever power off.3. The host can set the fixed doorbell music button.4. Rugged Waterproof Design. 57 Different Ring Tone The wirele doorbell has 57 melody tones and 4 levels of adjustable volume up to 110db. Memory Function Every time you turn on the doorbell, the music is the same melody as the last time you turned it off, no need to reset the previous settings. IP55 Waterproof Design The rugged construction and waterproof design allow the doorbell to withstand all kinds of harsh weather conditions. Up to 390ft/120m Transmiion Range (in open area) The long transmiion range ensures you will never mi a visitor, even if you are a few rooms away or on another floor.It is enough to cover every door and window in your house. Different Song Use for Different Mode Easy to Installation Plug and Play design is convenient and quick.s a CR2032 lithium battery that boasts 3-year maximum lifespan Installation Steps: 1. Stick the double-sided tape on the back of the waterproof doorbell transmitter.2. Install the F15 outdoor waterproof wirele doorbell transmitter in the place you need.3. Plug the M521 wirele doorbell receiver into main power. Technical Parameters: 1. Working voltage: AC 100-220V2. Working current: <100mA3. Wirele frequency: 433MHz4. Working temperature: -10 ° C ~ +50 ° C5. Wirele distance: 120 meters (open space)6. 4 level volume: 25dB-110dB Product Detail