Features Microprocessor technology provideshighly accurate and repeatable protection Built-in LCD and keypad afford a precisediqital setting Compact modular 43mm housing Adjustable over-and undervoltage,phase unbalance threshold Color: white Material: PC adjustable delay time forovervoltage, undervoltage phase unbalance Adjustable reset automatic resetor manual reset 1 NO&INC contacts Failure recording with last 3 faults Rated voltage: 380V 50-60Hz Operating range: 300-490VAC Protective FunctionsI Applications Phase Loss(Failure) Pase Sequence(Reversal) Phase Unbalance(Asymmetry) Undervoltage Overvoltage Applications Pumps, Fans, Refrigeration Unit, Blowers, Motors, Compressors, Lifts, Elevators, Crane, Mining excavators and conveyors Package Contents: 1 x Voltage Protector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.