【400 Meters Wireless Range】: TECKNET Wireless doorbell works up to 1300 FT in open areas and won't interfere with other wireless devices nearby. A strong and stable wireless signal ensures you won't miss any visitors 【Multiple Uses】: A battery doorbell requires no Wi-Fi or sockets. Receivers and transmitters can be placed anywhere and carried around as a pager. We can place the receiver freely on a table or in a pocket. Whether in the basement, garage, or backyard, you can always know visitors at the time 【60 Selectable Ringtones and Memory Function 】: The battery doorbell has 60 selectable ringtones with 5 adjustable volume levels from 0db to 110db and silent mode to meet your needs. The memory function allows the cordless doorbell to remember the last ring and volume, with no need to reset, even after a power outage 【Waterproof and Durable】: Waterproof doorbell constructed with IP65 waterproof ring and can withstand harsh weather (-20 °C to 60 °C). The Transmitter uses the environmentally friendly 3V CR2032 battery, the lifespan is up to 4.5 years 【36-Months Warranty and Easy Installation 】: The wireless battery doorbell comes pre-connected and is ready to install right out of the box with optional screw-free installation so that you can set it up in minutes. We provide free lifetime technical support and a 36-month（Registered Only) manufacturer's warranty, Weight: 0.17857443222 pounds, Manufacturer: TECKNET