ABS chocolate key core, fine craftsmanship, comfortable and durable Using PU leather material, high-grade and stylish With Fn combination multimedia key function Type-C charging interface design, with built-in 250mAh rechargeable battery Magnetic design for easy installation and removal Suitable for Microsoft Surface Pro 8/X Specification: Support protocol: Bluetooth 3.0/4.0/5.0 Lithium battery capacity: 250mAh Working environment temperature: -10 to +55 Charging time: 2-3 hours Use time: 95 hours Standby time: 60 days Button life: 500 million times Effective operating distance: 10 meters Compatible with: Microsoft Surface Pro X Microsoft Surface Pro 8 Microsoft Surface Pro 9 Microsoft Surface Pro 10 Microsoft Surface Pro 11 Package included: 1 x Keyboard 1 x Charging Cable 1 x English User Manual