Fitian Power Supply Adapter 12V/2.58A Charger for Microsoft Surface Pro 3 12 Inch Tablet with a 5V 1A USB Port (Pro 3 Charger Adapter with USB Port) Compatible with Microsoft Surface Pro 3 Only!! (Not Fit for Surface RT/ Pro/ Pro2!!) I/C Chip technology prevents your tablet's battery overcharging. Easy operation and convenient use, it is perfectly suitable for travelers and Businessman. Replacement for lost or damaged charger, USA standard plug version. Come with the 5V 1A USB female port, can charge the Surface Pro 3 by this USB port conveniently.