... protection for over&under voltage, over current and short circuit protection.3.Strong built for heavy duty and long usage ... over-voltage, over-current, overheat, short-circuit protective circuit.4. Has the maximum output power limiting function.5. Long use life design, ... testing, 6 hoursfull-load aging test, efficacy test and short circuit testing.Delivery Time:7 workdays Our service: ♥ All your ...