No Battery Waterproof Door Bell RF433 Home Calling Device Long-distance High Volume UK Plug Self Generating Kinetic Wireless Doorbell

1. Press to generate electricity for life without batteries, green and environmentally friendly, convenient for cross-border transportation

2.90 decibel ultra large volume, four level volume adjustment (including mute)

3. Classic private model, rounded appearance, mini and compact, simple yet not simple

4. Not afraid of water, can be used safely outdoors and in the washing room

5.38 ringtones, pleasant and melodious, with high notes that never break

6.150 meters long distance transmission, can pass through walls

7. With complete proprietary patents and certifications, cross-border sales are worry free

8. Plug specifications are available in China, the United States, Europe, and the United Kingdom, and can also be customized

9. Standard colors include white, black, and gold, and support customization of other colors (minimum order quantity 1000 sets)