Flash Wireless Home Doorbell Self-Generated Smart Remote Control Doorbell Without Batteries 1. Ringtones: 36 2. Power supply voltage: AC85V-260V 3. Power supply mode: plug-inpress power generation 4. Multi-functional intelligent doorbell, a variety of core technologies, wireless control, easy to pair through the wall, strong sensitivity, no interference, stable transmission 5. Simple operation, easy to install, adhesive design, no wiring, no batteries, with LED flash reminder, multi-music options, built-in switching power supply to save electricity 6. 36 chord music ringtones, built-in dual-tone stereo speakers, increase the volume, music as you choose, the sound is clear and bright, beautiful and moving 7. IP47 waterproof design, not afraid of sunshine and rain, doorbell button after special waterproof treatment, suitable for outdoor harsh environment weather 8. 280m sensing distance, stable signal, wide coverage, RF technology transmission, long-distance signal transmission, covering every room, easy to realize the reminder function 9. 4-speed volume adjustable, personalized design, adjustable volume, volume up to 100 dB, 150 square meters range can be heard, stir-frying can also be heard 10. Free to match, refused to series ringing, the host can distinguish between different buttons, different buttons press the doorbell host issued by the bell is not the same, personalized design