[Waterproof doorbell & easy installation] The doorbell is waterproof, with a minimalist design and simple operation. It is very easy to install wirelessly, the button is attached to the outside wall, and the doorbell receiver is plugged into the socket and ready to use [Various ringtones and adjustable volume] 36 ringtones for different options , 4 volume levels adjustable, 85dB maximum loudness level. [Ultra High Range] This wireless doorbell provides long distance connection up to 300M, the wireless signal strong and stable allows you to hear the doorbell clearly even if you are a few rooms away or on another floor. [Widely Used] You can install it wireless doorbell anywhere in your house, garden , your desk or mailbox. [Memory Function] The chime remembers your last melody and associated volume level after a power outage; no need to reset your previous settings; practical and easy to use by the user.