UL Certified in North America! The K-Series Smart Control Module fits European, American, and Chinese 86mm standard electrical boxes. Compact in size, simply place it inside the box to instantly transform traditional switches and reset switches into smart devices! Supports multiple protocols and ecosystems including Bluetooth, Matter, DALI, 0-10V, Triac, PUSH DIM, and Relay ON/OFF, making smart retrofitting more efficient and cost-effective!