1.over-charge protection 2.over-current protection 3.over-temperature protection 4.short-circuit protection Laptop Power AC Adapter 19.5V 3.3A BrandSNBMWConditionBrand NewInput Voltage100V-240VOutput parameter19.5V==3.3ACompatibleFor SonyProduct TypeROSE-8111Place of OriginChina Payment T/T,Paypal,ESCROW,Western Union Shipping Information:We ship through DHL,EMS,FEDEX,UPS,TNT....and so on.1.DHL ...