Tablet Bluetooth keyboard combined with protective case, convenient for a business trip The Bluetooth 3.0 keyboard has a long-lasting button life, durable to use With a pencil loop for storage, so that you are not afraid of losing your pencil Fine workmanship, and equipped with 3 colors backlit so that you can normally use it at night The keyboard has a built-in lithium battery, convenient to charge and use Can be converted to a supporting stand for hands-free movie watching and web surfing Slim and lightweight design, convenient for travel, business trip, etc. Specifications: Bluetooth: 3.0 standard Effective operating distance: 10 meters Modulation method: GFSK Working voltage: 3.0-4.2V Working current: <2.5mA Standby current: <0.3mA Sleep current: <40uA Charging current: >200mA Standby time: >100 days Charging time: 3-4 hours Lithium battery capacity: 450mAh Sustainable working hours: 100 hours Lithium battery life: 3 years Button force: 80±10g Button life: 5 million clicks Working temperature: -10°C -﹢55°C Charging port: Type-C Backlit: Yes