Compatibility: Compatible with all 9.7-inch iPads, including the iPad 2018/2017/Air 2/Air/Pro 9.7. Slim & Lightweight: The keyboard is 0.4 cm thick; the case just 0.1 cm thick. Stable & Responsive: Uses a Broadcom Bluetooth chip, the same used by Apple devices, for faster & more stable performance. Long-Lasting Battery:Takes just 2 hours to charge and lasts up to 30 days. compatibility: compatible with all 9.7-inch ipads, including the ipad 2018/2017/air 2/air/pro 9.7. slim & lightweight: the keyboard is 0.4 cm thick; the case just 0.1 cm thick. stable & responsive: uses a broadcom bluetooth chip, the same used by apple devices, for faster & more stable performance. long-lasting battery:takes just 2 hours to charge and lasts up to 30 days.