-Input voltage:AC 100-240V(wide voltage automatic adaptation, no switching); -Power factor PF value 0.99/110V (100% in full load) PF value 0.98/220V (100% in full load); -Output overload protection:Overload protection ways for constant current limit flow pattern lock output current value does not rise, the output voltage with load increasing; -High temperature protection:PWM transistor heat sink temperature of 85 + / - 5% when shut off the output voltage, temperature to 75 + 5% for automatic recovery; -Output short circuit protection:Since the xs, short circuit back output; -The output over voltage protection:Overvoltage point 115% of the nominal voltage, over voltage protection lock, after will not automatically restore, need again when the power is cut off electricity; -Working temperature:25 degrees below zero - 45 degrees centigrade, overtemperature need to down load; -The cooling way:Automatic temperature control speed fan (blowing); -Weight:3 LBS; Size: 10.5 X 5.1 X 1.57 INCH(L*W*H) One year warrant. -Wide voltage input:Ac 100-240v wide voltage input, automatic adaptation no 110/220 switch. -Constant pressure constant current Both can work in the state of constant pressure and can work in the state of constant current voltage current adjust alone.