Ultra slim fashion design and easy to carry ultra-thin frame - Built-in solid micro USB cable. Space-saving and no need extra micro USB cable - For iPhone converter is needed (Not Included) - Quickly and effectively solves the low power problem for your device when travel - Great for emergencies travel etc.; easy to use quick to charge - Built in a high quality Li-polymer rechargeable battery cell to extend the life time - Output: 5V / 1A USB port for charging devices. Input: 5V / 1A. Use a 1A adapter (not included) for fastest charging time.