【55 Melodies & 5-Level Volume】High quality outdoor wireless doorbell, adopt the most stable music chip, built-in 55 melodies, Create clear and pure sound. Four adjustable volume levels from 0db to 110db. When the bell rings, you can easily hear it around the house. Memory function is available for sound and chime selection. 【Waterproof & Smart LED Design】The outdoor waterproof wireless doorbell Superior material is waterproof to IP55 standard, stable performance is guaranteed for outdoor use. Blue LED on button and receiver is visual indication for guest and visitor, it is also fun and thoughtful design for hearing impaired. Visitors know they've used the correct doorbell because it lights up when used. 【Easy Installation】Simply plug the outdoor doorbell receiver into an electrical outlet and install the button -push with double-sided tape and screws included. Template for drilling screw locations included if you choose to drill holes to mount the push button. 【Widely Applied】A