Bluetooth keyboard and leather protective case two-in-one design Detachable keyboard, the keyboard can be used on its own, convenient and practical Supporting stand for hands-free movie watching and web surfing Built-in rechargeable battery, can charge the keyboard via the attached USB cable with plentiful trackpad gestures, allowing you to click, scroll, and swipe through content effortlessly Specifications: Bluetooth version: V3.0 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: 150mAh Sustainable working hours: 100 hours Lithium battery life: 3 years Button force: 80 ±10g Button life: 5 million times Working temperature: -10 to +55℃