... ,short-circuit protection 3.Warranty:2 years usa plug 5v 12v usb power adapter : Input Voltage100~240VOutput Voltage3~24VOutput Current2A maxPower15W maxSize75X28X45mmOEM ... etc Assembly full inspection: to make sure every unit with power ,without low voltage, without bad led indicator, low ... burn-in: to make sure every unit with high temperature resistance, with power ,no bomb unit, no high voltage, ...