Gengshi&reg;Microsoft Surface Pro 3,Pro 4 Type Cover keyboard for Microsoft Surface Pro3 ,pro4 with Aluminum Series Bluetooth Keyboard Case Touchpad For Microsoft Surface pro 3/pro 4 Energy-Saving keyboard sleep mode, Ergonomic design.Compatible with:Microsoft Surface Pro 3,Pro 4 Light weight , quiet keystrokes, & spill-proof; Easy operation, need no drive, just plug and play. Built-in slimmest wireless Bluetooth 3.0 keyboard, connecting entering password Built-in Rechargeable lithium battery lasts for approximately 100 hours per charge. Not compatible with Microsoft Surface 3 10.8 ,No charger!