【Powerful Long-Range Signal】This white waterproof wireless doorbell has 2 chimes. The penetrating wireless signal can transmit up to 300 m in an open space and over long distances even with many obstacles (doors, walls). You'll never miss any of your visitors. The doorbell does not interfere with other equipment in your or your neighbors' homes. 【36 Melodies and 4-Level Volume】High-quality speaker, adopts the most stable music chip, built-in 36 melodies, creates a clear and pure sound. Four adjustable volume levels from 25 dB to 85 dB. When the doorbell rings, you can easily hear it in the house. The memory function is available for sound and bell selection. 【Waterproof and Intelligent LED Design】The wireless transmitter is made of superior quality material and is IP44 waterproof, ensuring stable performance for outdoor use. The blue LED on the button and receiver provides a visual indication for both the host and visitor, and is also a fun design designed for the hearing impaired.