The leather case is made of skin-friendly PU material, and the back is made of flexible TPUThe TPU case adopts the honeycomb design, which can effectively heat dissipationWith a pen slot for storage, you are not afraid of losing your pencilsComes with Bluetooth keyboard 3.0, upward compatible with 5.1 Bluetooth devicesThe Bluetooth keyboard adopts a high-speed chip, which can connect to Bluetooth devices in secondsIt is charged with the Micro USB cable, and it can be freely carried and used when fully charged Specifications: Battery material: lithium-polymer batteryBluetooth: BT 3.0 (upward compatible with 3.0/4.0/5.0/5.1 Bluetooth devices)Effective distance: 10 metersStandby time: 100 daysWorking hours: not less than 100 hoursCharging time: 2-3 hoursLithium battery capacity: 280mAhLithium battery life: 2 yearsButton life: 3 million clicksModulation method: GFSKWorking voltage: 3.0-4.2VWorking current: 14-17mAStandby current: Sleep current: Charging current: 100mACharging method: Micro USB cable charging Package included: 1 x Protective Case 1 x Bluetooth Keyboard 1 x Charging Cable 1 x English Manual Other items not included