Arclyte A04252 Microsoft Surface Pro-3 Replacement Charger Power Supply It is 100% compatible with Microsoft surface pro 3 The input is 110v-22v/50-60 hz output: 12v, 3.0amp, 36W Ul certified for safety and emi compliant Replaces Microsoft part number rc2-00001 Enhanced charging capability over original 3 amp vs 2.58 amp