【55 Melodies & 5-level Volume】High-quality outdoor wireless doorbell, uses the most stable music chip, built-in 55 melodies, creating a clear and pure sound. Four adjustable volume levels from 0db to 110db. When the bell rings, you can easily hear it in the house. Memory function is available for sound and chime selection. 【Waterproof and Smart LED Design】The waterproof outdoor wireless doorbell is made of superior material and is IP55 waterproof standard, stable performance is guaranteed for outdoor use. Blue LED on the button and receiver is a visual indication for host and visitors, it is also a fun and thoughtful design for the hearing impaired. Visitors know if they have used the correct doorbell, as it lights up when used. 【Easy Installation】Simply plug the wireless doorbell receiver into an electrical outlet and install the push button with the included double-sided tape and screws. Template for drilling screw placements is included if you choose to drill holes to mount the push button. 【Wide Application】A perfect wireless doorbell set for home, apartment, school, villas, office, warehouse, hotel, factory, hospital and more. The stereo speaker delivers a rich and crisp sound, flashing light indicators that are easy to notice for people, including the hearing impaired. 【Durable with Low Consumption】This IP55 waterproof doorbell works between -30°C and 70°C (-22°F and 158°F), withstands various severe weather conditions. The transmitter has extremely low power consumption; Uses a 12V/23A battery (included in the product) with a maximum lifespan of 3 years. Features: Internal sounds: 55 chimes Waterproof (transmitter): IP44 Volume: Adjustable in 5 levels (0 dB ~ 110 dB) Operating temperature: -22 ° C ~ 70 ° C Wireless range: Maximum 300M/1000 feet (in open air) Transmitter power: 1 x 12V 23A battery (included)