Keyboard Case for iPad 9.7-inch (2018)/(2017)/iPad Pro 9.7 inch (2016)/iPad Air 2/Air (2013) X7 Bluetooth Keyboard + Leather Cover - Matcha Green •[Durable PU Leather Cover] The leather case is made of skin-friendly PU material, and the back is made of flexible TPU •[Pen Slot Design] With a pen slot for storage, you are not afraid of losing your pencils •[Touchpad Bluetooth Keyboard] Comes with Bluetooth keyboard 3.0, upward compatible with 5.1 Bluetooth devices •[Stable Bluetooth Connection] The Bluetooth keyboard adopts a high-speed chip, which can connect to Bluetooth devices in seconds •[Rechargeable Keyboard] It is charged with the Micro USB cable, and it can be freely carried and used when fully charged •Specifications: •Battery material: lithium-polymer battery •Bluetooth: BT 3.0 (upward compatible with 3.0/4.0/5.0/5.1 Bluetooth devices) •Effective distance: 10 meters •Standby time: 100 days •Working hours: not less than 100 hours •Charging time: 2-3 hours •Lithium battery capacity: 280mAh •Lithium battery life: 2 years •Button life: 3 million clicks •Modulation method: GFSK •Working voltage: 3.0-4.2V •Working current: 14-17mA •Standby current: