I. Innovation Background Market Pain Points Battery Dependency: 78% of wireless doorbell failures caused by battery issues (Consumer Reports 2023) Installation Limitations: Wired solutions require complex retrofitting Range Reliability: Typical products fail beyond 30m/2 walls Technology Breakthrough KKPCB‘s kinetic energy harvesting solution achieves: Zero Battery Operation: 200,000+ press cycles durability Instant Power Generation: 3ms energy...











