Made of quality PU leather + transparent acrylic case, durable for use Can be folded as a bracket stand multi-angle adjustment, for hands-free media entertainment The keyboard has a built-in 420mAh large-capacity lithium battery, convenient to charge and use Equipped with 3 colors backlit so that you can normally use it at night The Bluetooth keyboard adopts a high-speed chip, which can connect to Bluetooth devices in seconds With a pen slot for storage, you are not afraid of losing your pencils (pencil is not included) Specifications: Bluetooth: Standard 5.0 Effective operating distance: 10 meters Modulation method: GFSK Working voltage: 3.7-4.0V Working current: <8mA Standby current: <0.3mA Sleep current: <50uA Charging current: >200mA Standby time: >100 days Charging time: 2-3 hours Lithium battery capacity: 420mAh Sustainable working hours: not less than 30 hours Lithium battery life: 3 years Button force: 80±10g Button life: 5 million clicks Working temperature: -10℃ to +55℃ With backlight: yes Charging port: Type-C Size: 25*20*2cm Weight: 566g