55 Melodies & 5-Level VolumeHigh 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 DesignThe 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 InstallationSimply 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 AppliedA perfect wireless doorbell kit for home, apartment, office school, villas, office, warehouses, hotel, factory, hospital and more.Stereo speaker delivers rich, crisp sound, flashing light indicators that are easy for people to notice , including the hearing impaired. Durable With Low Power ConsumptionThis IP55 waterproof doorbell operates between -30C and 70C (-22F and 158F), withstands a variety of harsh 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: Max 300M/1000ftoutdoor Transmitter power: 1 x 12V 23A battery (included)