Nozza for Surface Pro 3 Charger Surface Pro 4 Power Supply Adapter,36W 12V 2.58 A Charger Replacement for Microsoft Surface Pro 3 Pro4 (Conroe i5, i7 versions) Power Supply - RC2-00001.With 1.7 FT(0.5M) power cable, totally almost 6.6 FT length Input: AC100-240V (worldwide use) Output: 12V 2.58A 36W Additional USB Port: 5V 1A USB 2.0. The USB port allows you to charge another device such as your phone at the same time. Magnetic snap-in power adapter charges Surface Automatic thermal, overload cut-off, and short circuit protection