320m Wireless Range: The plug-and-play doorbell has a reliable 320m wireless range and powerful signal transmission, so you won't miss visitors even if you're a few rooms away or on another floor. Multiple Waterproof Protection: The transmitter has a removable waterproof shell design, IP65 dustproof and waterproof wireless doorbell chime. Withstands a variety of harsh weather conditions, the wireless doorbell can be used at home, office, hotel, garage, store, apartment, vacation home, garden, hospital, school. 5 LEVELS 38 VOLUME: This wireless doorbell has 38 ringtones (including Christmas ringtones) to choose from, 5 volume levels, adjustable volume from 20dB to 110dB and the volume is very loud and can be heard throughout the house. Each LED transmitter and receiver has an indicator that is very convenient for people with hearing impairments and people who want to keep the environment quiet. The doorbell can also be used as a pager: simply plug the receiver into the power outlet,