【Waterproof Doorbell Easy Installation】- The doorbell is waterproof according to the standard, with minimalist design and simple operation. It is very easy to install wirelessly, the button is fixed to the outside wall and the doorbell receiver is plugged into the socket and ready to use 【Ultra-reliable launch distance】- 300m reliable wireless signal coverage without interfering with your home electronics, ensuring you never miss your visitors or parcels again, up to 3 years of transmitter battery life to ensure a superior user experience 【Various ringtones and adjustable volume】- 55 ringtones for different options, 5 levels of adjustable volume and clear melodies that can be heard even if you are in another room and several floors away 【Loud doorbell and flashing LED】- The 100dB loud doorbell with flashing LED is designed for the hearing impaired and the elderly, and of course can be set to 0dB so as not to be disturbed