Product Description [300m/1000ft Long Distance] This wireless doorbell has a range of 300m, a maximum sound intensity of 85dB, and comes with 2 transmitters connected to 2 receivers. Individual pairing ensures each button has its own chime so you know which door someone is at. 36 Melodies & 4 Volume Levels] High-quality speakers, the most stable music chip, built-in 36 melodies, creating clear and pure sound. Four adjustable volume levels from 25dB to 85dB. When the bell rings, you can easily hear the sounds in the house. Select the memory function for sounds and ringtones. Waterproof & Smart LED Design] The wireless doorbell is made of high-quality materials, IP44 waterproof, to ensure stable performance for outdoor use. The blue LEDs on the buttons and receiver are visual indicators for guests and visitors, and a fun and detailed design for the hearing impaired. Visitors know they are using the correct doorbell because it lights up when used. Easy Installation] No wiring required.