Digital Treasures Props Keyboard Case for iPad mini (DRDT-20247) Broadcom 20730 Chipset With Wireless Bluetooth 3.0 Interface 180mAh Li-Ion Battery Capacity 59-Key Keypad With 13 Dedicated iPad Mini Keys Built-in power management software Up to 80 hours uninterrupted working time Up to 100 days standby time 4 - 4.5 hours charging time