The dual LED display adjustable voltage current protector is suitable for single-phase AC 220V, 50/60Hz, rated working current 63A. It is mainly used for residential household box input or over voltage, under voltage or over current protection of distribution lines for single phase electrical equipment. Its main feature is that when the circuit has over voltage or of under-voltage, over-current, the product can cut off the power instantly to protect the electrical equipment from damage, in addition, the protector can automatically turn on the power when the circuit voltage returns to normal. overvoltage, undervoltage and overcurrent of this product can all be configured by yourself and can be adjusted on the basis of local practical conditions. Specification: Rated supply voltage: AC 220V Operating voltage range: AC 80V-400V ( Single Phase) Rated Frequency: 5 0/60 Hz Electrical current (gt;A)Adjustment range: 1-63A Over voltage (gt;U) Adjustment range: 230-300V Under voltage (lt;U) Setting range: 140-210V Error: 2 gt;U and lt;U Trigger delay: 0.5s Reset / Start delay: 1s to 600s voltage & ; Current Protection - Turn off the power when the circuit has over voltage, under voltage or over current. Protect your home electrical equipment from damage. Auto Reconnect -- Turn on the power when the circuit voltage and current return to normal. Adjustable - Value range of overvoltage 230V-300V, undervoltage value range 140V-210V, overcurrent value 1-63A. Fault recovery time adjustable from 1 to 600 seconds Dual LED displays - Two separate digital LED displays can show the actual voltage, current independently for easier and clearer reading, can be used as a voltmeter and ammeter. Customizable -- The overvoltage, undervoltage and overcurrent values of this product can all be configured by yourself and can be adjusted according to local practical conditions. Packing List: 1 * Voltage & AMP Protector 1 * User Manual