Wireless Smart Doorbell – Self-Powered, 38 Chime Tones, 1000ft Range, IP55 Waterproof, US/EU Standard (White, Model 205)​

The Future of Doorbells is Cordless & Battery-Free​​ Our piezoelectric energy harvesting system converts kinetic energy into electrical power with every press. ​​Engineered for Global Homes​​ ✧ ​​Dual-Frequency Transmission​​ – 433MHz (EU) & 315MHz (US) auto-switching ✧ ​​Military-Grade Encryption​​ – Prevent signal hijacking ✧ ​​Expandable Receiver System​​ – Connect up to 5 chime units ✧ ​​Smart Mode Memory​​ – Remembers last used melody ✧ ​​DIY Installation​​ – No wiring, 3M adhesive & screw options ​​Next-Level Security Features​​ • ​​Intruder Alert​​ – Continuous ringing triggers alarm • ​​Child Safety Lock​​ – Disable button during naps • ​​Low-Temperature Resistance​​ - Operational from -20°C to 60°C ​​Hear the Difference​​ Experience crystal-clear HD chimes that never fade.