General description This CSPARKV Wireless Doorbell is designed for both home and office use, featuring a stylish black finish. It offers a range of 45 melodious ringtones and 4 adjustable volume levels, including a silent mode with a constant LED flash. With a long-distance coverage of up to 400 meters in open areas, this doorbell ensures reliable performance without interference from other devices. Technical specifications Distance Coverage: 200-400 meters (open areas) Volume Levels: 4 (including silent mode) Ringtones: 45 different melodies Waterproof Rating: IP44 Operating Temperature: -20°C to 50°C Installation Plug-in receiver for easy setup Includes double-sided tape and screws for mounting the transmitter (button) Simple installation: just plug in the receiver and turn it on Usage Change ringtones with a single button press Memory function retains volume and ringtone settings after unplugging Suitable for outdoor use due to waterproof and dustproof features