Power Tube Simple 5200 is a portable charging gadget compatible with most Micro USB powered devices like Samsung, HTC, Motorola, Sony Ericsson, Blackberry and tablets and game consoles. It can provide your device with 5200mAh extra capacity. It"s interfaced with a cable that has a Micro USB connector & male input dock in one component on the top. An extra USB port is designed to ensure its compatibility with most mobile devices including iPhone 5, which enables charging to a second device at the same time. The anodized aluminium casing with vivid colours makes the whole body a compact and elegant artefact, and there is also battery level indicator which can tell you how much juice is left. Remaining battery is shown by built-in LED indicator through a press on the button: four LEDs means the remaining battery is 75%~100%, three, 50%~75%, two, 25%~50%, one, below 25%.