Specifications: 1) Advance microprocessor (MPU) controlled 2) Dynamic LCD display 3) High-precision regulator 4) Input voltage digital display 5) Output voltage digital display 6) Output current digital display 7) Extreme high voltage protection 8) Overload protection 9) Output short circuit protection 10) Delay time selectable 11) Regulate precision selectable Primary technical parameters: 1) Input: AC 140 - 250V/ 72V - 126V 2) Output: AC 220V/110V;1 ~ 3% 3) Frequency: 50 / 60Hz 4) Delay output time: 6secs / 3mins