Features: brand new and high quality Magnetic installation, built-in a number of highly magnetic magnets, adsorption tight not fall off. It folds into a protective for case to provide proper pro-tection for the front and back of the body, but it is very light to carry, and can easily fit in a backpack or on a small tabletop. Easily return to the home screen , switch be -tween spaces, and more with multi-touch gestures and the os exclusive cursor. Keyboard for case lining with microfiber material, with excellent wear resistance, Cold resistance, breathability, aging resistance is excellent. The has very good for protection. Adjust the bracket as you like, so you can easily find the right viewing angle. Specifications: Effective operating distance: 10 meters Modulation method: GFSK Working voltage: 3.3-4.2V Charging current: <250mA Standby time: 90 days Charging time: <3 hours Lithium battery capacity: 500mAh Continuous working time: ﹤5 hours (turn on the backlight), ﹤80 hours (turn off the backlight) Lithium battery life: 3 years Working temperature: -20 -50° Applicable models: for Air4 10.9/ Pro11 2021/2020/2018 for Pro12.9 2021/2020/2018(optional) Product size: approx. 25.5x19.5x2cm/10.04x7.68x0.79in Product size: approx. 28.7x23x2cm/11.30x9.06x0.79in Package Includes: 1PC x Tablet Protective for Case 1PC x Keyboard note: This product is a Bluetooth-compatible keyboard, not an original keyboard.