Single-phase electric energy meter, applied to active power measurement: high measurement accuracy (1.0 level), accurate measurement and small size (18mm), can be easily installed in various terminal distribution boxes. Rail mounting, bottom wiring, and miniature circuit breakers. Intuitive and easy-to-read mechanical display reduces the risk of accidental power outages. No external working power is required. Wide operating temperature range. Taixing Longyi Terminals Co.,Ltd. , https://www.lycopperterminals.com