... high reliability, long lifespan, less interference to radiothermostat:1.with CQC VDE UL certification;2.Electrical Rating:10A.15A;3 ... , flat moving ring general aluminum cover with mounting hole, extra length aluminum cover with mounting hole Structure and application:KI-31 serial ... in a clean, dry and corrosive gas-free warehouse with good ventilation and at relative humidity below 90%, environment ...