2-in-1 design, it is not only a Bluetooth keyboard protector but also a tablet case The Bluetooth 3.0 keyboard has a long-lasting button life, durable to use 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 Strong magnetic absorption at keyboard position, and the keyboard wont move easily There is a slot to place your pencil device, dont worry about losing it Not Included Pencil 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 gt 100 days Charging time 3-4 hours Lithium battery capacity 150mAh Sustainable working hours 100 hours Lithium battery life 3 years Button force 80 plusmn10g Button life 5 million clicksnbsp Working temperature -10 -55