☑️ ☑️【No battery required】The door bell generates its own electricity through the force of pressing the external module, and sends a steady signal to the receiver; it solves the trouble offrequent battery replacement. When installing, just insert the receiver where you need to hear it; Then place the wireless doorbell with screws or the included tape, where you want someone to press the button. ☑️ ☑️【150 M & 500 Feet Super Long Wireless Range】Strong penetrating power, stable signal, strong anti-interference, will not interfere with other devices in your home or neighbors. Wireless door bell system can add more receivers or push buttons for increased coverage. ☑️ ☑️【60 Ringtones & 5 Volume Levels】60 ringtones provide rich and crisp sound; 5 adjustable volume levels, the maximum setting is 115 dB; This Waterproof Doorbell Kits are suitable for home, apartment, classroom, hotel, factory, hospital Etc, to make sure you don't miss any visitors, the bell can be heard even from the back garden. ☑️ ☑️【IP66 Waterproof and Dustproof】The Waterproof Wireless Doorbell is made of high-quality ABS material, which can protect itself from high temperature, low temperature and interference; The outside of the doorbell chime is IP55 waterproof, which can withstand the harshest weather (-4 °F to 140 °F). ☑️ ☑️【Wireless Doorbell】Silent 110dB speaker with LED flashing light is perfect for baby sleeping, hearing impaired, nursing pager. When you press different wireless doorbells, the receiver will emit different melodies, which is convenient for knowing that there are visitors at the front door/back door. Door Bell Kits Contains: 1 Press Self-Powered Transmitter and 1 plug-in smart doorbell receiver, 2 screws, 1 instruction manual, 1 double-sided tape , 1 cleaning cloth.