Features: brand new and high quality Built in high-capacity battery:Charging for 2 hours,endurance for more than 30 days,power consumption as low as 1uA. There is no need to be afraid that battery is out of juice during business travel. Comfortable typing:lntegrating performance and hand feel brings you excellent mute experience and knocking feeling in class or meeting.Only 70g knocking force helps you type content quickly and accurately without any noise. Comprehensive protection:Adopts a combination of hard and soft by splicing TPU borders and PC back plate to avoid falling and scratching. Pencil holder: Specially designed for pencil.Charge immediately once you put it into the slot. for Smart trackpad:Adopt dual core processor with multi-channel memory.Through the stable bluetooth-compatible connection,the for touch sampling rate is up to 120Hz,making the operation more smooth and sensitive.Support various multi-touch quick gestures no need to raise your hand to for touch the screen frequently when work or study. lntelligent sleep,reducing power consumption:The keyboard will automatically enter the standby state if there is no operatlon within 10 minutes You can press any for key to wake up automatcally. Specifications: Product name: Keyboard Case Bluetooth-compatible version: 3.0 Effective operating range:Within 10 meters Working voltage:3.0-4.2V Working current:<2.5mA Standby duration:>120 days Charging time:<1.5 hours Lithium battery capacity:150mAh Working time:>100 hours Used for : For Air 4 , Pro 11 2021 2020, 9th 8th 7th Generation Package Includes: 1PC x Tablet Protective Case 1PC x Keyboard note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!