【Waterproof Doorbell and Easy Installation】 - The doorbell is waterproof according to IP55 standard, with a minimalist design and simple operation. It is very easy to install wirelessly; the button is attached to the outer wall, and the doorbell receiver plugs into the socket and is ready to use. 【Ultra-reliable Range】- 300m reliable wireless signal coverage without interfering with your home electronics, ensuring you never miss visitors or packages again. Up to 3 years of battery life for the transmitter for a superior user experience. 【Various Ringtones and Adjustable Volume】- 55 ringtones for different options, 5 adjustable volume levels and clear melodies that can be heard even if you are in another room or several floors away. 【Loud Doorbell and Flashing LED】- The 100dB loud doorbell with flashing LED is designed for the hearing impaired and elderly, and can of course be set to 0dB to avoid being disturbed.