Specifications: 1) Advance microprocessor (MPU) controlled 2) Double meters display 3) High-precision regulator 4) Input voltage digital display 5) Output voltage digital display 7) Extreme high voltage protection 8) Overload protection 9) Output short circuit protection 10) Delay time selectable Primary technical parameters: 1) Input: AC 140 - 250V/ 72V - 126V 2) Output: AC 220V/110V;5 ~ 10% 3) Frequency: 50 / 60Hz 4) Delay output time: 6secs / 3mins Product models: TM-300VA, 500VA, 1000VA, 2000VA, 3000VA, 5000VA, 8000VA