Conveniently charge your mobile devices with this back-up battery pack. Simply connect your device to the built-in connectors and tap the power button to start charging. When the back-up battery pack needs more power recharge via a USB connection or wirelessly on the PowerMat® (sold separately). Adapter/Charger Type: Portable Mobile Charger; For Device Type: Mobile Devices; Connector/Port/Interface: Apple® 30-Pin; Micro USB; Capacity: 1850mAh.