The business style leather case is made of high-quality material Fine workmanship, and equipped with 7 colors backlit so that you can normally use it at night With a pen slot for storage, you are not afraid of losing your pencils Comes with Bluetooth keyboard 3.0, upward compatible with 5.1 Bluetooth devices The keyboard can be disassembled from the case, and the strong magnetism makes the keyboard not easy to fall off The Bluetooth keyboard adopts a high-speed chip, which can connect to Bluetooth devices in seconds It is charged with the Micro USB cable, and it can be freely carried and used when fully charged Specifications: Battery material: lithium-polymer battery Bluetooth: BT3.0 (upward compatible with 3.0/4.0/5.0/5.1 Bluetooth devices) Effective distance: 10 meters Standby time: 100 days Continuous working time: not less than 30 hours Charging time: 2-3 hours Lithium battery capacity: 280mAh Lithium battery life: 2 years Button life: 3 million clicks Modulation method: GFSK Working voltage: 3.0-4.2V Working current: 4-8mA Standby current: Sleep current: Charging current: 200mA Power: 0.55W Backlight: Built-in backlight panel, 7 colors of light Charging method: MicroUSB cable charging Package included: 1 x Bluetooth Keyboard 1 x Protective Case 1 x Charging Cable 1 x English Manual Other items not included