BMOUO Bluetooth Touchpad Keyboard Portfolio Case Touch Cover for Microsoft Surface Pro 3 12" - DETACHABLE Bluetooth Keyboard Stand Case / Cover for Microsoft Surface Pro 3 12 inch Win8 Tablet , Black Color Made exclusively for 12 inch Surface Pro 3 (3rd Generation) Windows 8.1 Tablet. 3-In-1 functionality: Bluetooth V3.0 keyboard + Stand + Premium Carrying Case. High quality PU leather with removable wireless keyboard style shows a smooth appearance Real laptop style keys; ABS keyboard material allows flexibility to playing & typing QWERTY Standard US layout; Charging time 2.5 - 3 hours; Estimated uninterrupted working time 60 hour