The Bluetooth keyboard case is not only a keyboard but also a tablet case, convenient for a business tripThe Bluetooth 5.0 keyboard has a stable connection, a long-lasting lifetimeThe keyboard has a built-in 250mAh large-capacity lithium battery, convenient to charge and useCan be converted to a supporting stand for hands-free movie watching and web surfingDesigned with a Touchpad instead of the mouse, and a built-in pencil holder to store your pencilSlim and lightweight design, convenient for travel, business trip, etc. Specifications: Standard Bluetooth 5.0 interfaceWorking distance: within 10 metersModulation mode: GFSKWorking voltage: 3.0-4.2VWorking current: <2.5mAStandby current: <0.3mASleep current: <40uACharging current: > 200mAStandby time: > 100 daysCharging time: 3-4 hoursLi-ion battery capacity: 250mAhSustainable working time: > 60 hoursBattery life: 3 yearsKey force: 80±10gKey life: 5 million clicksOperating temperature: -10-+55Charging method: Type-C Compatible with: Microsoft Surface Pro X Microsoft Surface Pro 8 Microsoft Surface Pro 9 Package included: 1 x Bluetooth Keyboard Case 1 x Cable 1 x English and Chinese Manual Other items not included