[300m/ 1000ft Long Range]Features 300m range and 85dB max sound intensity, this wireless doorbell comes with 2 transmitters linked to 2 receivers. Individual pairing ensures that each button has its own ringtone to know which door someone is at. [36 Melodies & 4-Level Volume]High quality speakerphone, adopt the chip of most stable music, Built-in 36 melodies, Create clear and pure sound. Four adjustable volume levels from 25db to 85db. When the bell rings, you can easily hear it around the house. Memory function is available for sound and chime selection. [Waterproof and smart LED design]The wireless doorbell made of superior material is waterproof to IP44 standard, stable performance is guaranteed for outdoor use. Blue LED on the button and receiver is a visual indication for guest and visitor, it is also a fun and thoughtful design for the hearing impaired. Visitors know they've used the right doorbell because it lights up when used. [Easy Installation]No wiring required. Simply