New SHARKK iPad Bluetooth Keyboard 3 in 1 Portable Station With Built In Speaker And Built In Backup 5000 mAh Battery Power Bank For iPad 2, The New iPad 3, iPad 4 (4th Gen) With Retina Display And Other Tablets - Includes iPad Shell Case Use the Keyboard to charge your portable devices by plugging them into the side of the keyboard. Capacity: 5000mAh. Output: 5V/1.5A. Micro USB. 1 Output Plug. Micro USB to Regular Size USB plug adapter included. Built in speaker connect via Bluetooth. Frequency response: 20Hz-20KHZ. Works for 14 Hours on full charge. Full volume and mute control on keyboard with LED indicators. Works with all iPad models and other tablets but the iPad holder will only fit all models of iPad 2, iPad3, iPad4. iPad Skin/case is included