IP68 Waterproof Self-Powered Wireless Doorbell – 433MHz Long Range, 60 Melodies, AC-Powered Receiver (US/EU Plug Options, Expandable 1-to-2 System)​

Weatherproof & Truly Wireless!​​ The ​​KOSSTON R18 doorbell​​ features an ​​IP68-rated transmitter​​—​​submersible in water​​ and dustproof. No more worrying about rain or accidental drops! ​​ Why Choose This Doorbell?​​ ✔ ​​Self-Generating Button​​ – Press to create power (​​zero batteries!​​). ✔ ​​433MHz Long-Range Signal​​ – Covers ​​150m+​​ (open area) through thick walls. ✔ ​​60 Chime Options​​ – From classic "Ding Dong" to soothing melodies. ✔ ​​AC 100-240V Receiver​​ – Works worldwide (​​US/EU plug options​​). ✔ ​​Expandable System​​ – Supports ​​1-to-2​​ or ​​2-to-1​​ setups (sold separately). ​​ Built for Demanding Spaces:​​ • ​​Loud & Clear​​ – Adjustable volume for ​​factories/hotels​​. • ​​Easy Installation​​ – Stick or screw mount (​​no wiring​​). • ​​LED Visual Alert​​ – Flashes when pressed (​​ideal for noisy areas​​). ​​Package Includes:​​ 1 Self-Powered Waterproof Transmitter 1 AC-Powered Receiver (US/EU Plug) Adhesive Pads & Screws