A102B For iPad 10.2 inch 2019 Ultra-thin Detachable Bluetooth Keyboard Leather Tablet Case with Stand & Pen Slot Function 1. The performance of the chip is stable. 2. Built-in 220mAh lithium battery for 50 hours. 3. Charge with Micro USB cable and charge for about 4 hours. 4. Sleep function, if no operation is performed, the keyboard will automatically enter the power saving mode within 15 minutes. 5. 59 button design with 14 iPad shortcut keys. 6. The button is screen printed by UV peritoneal treatment, durable, 5 million times of friction and knocking does not fade. 7. The keyboard surface is brushed and very textured. 8. Scissor foot button design, sensitive typing, quick response, good feel. Product Specifications: 1. Modulation mode: GFSK. 2. Working voltage: 1.8-3.6V. 3. Charging time: 4 hours. 4. Lithium battery capacity: 220mAh. 5. Sustainable use time: 50 hours. 6. Lithium battery life: 3 years. 7. Standby time: 30 days. 8. Size: 248x150x4mm. 9. Net weight: 400g.