Supports Bluetooth, cell phones, smart phones, MP3s, Media Player?, digital cameras & gaming. Rechargeable over 500x. Features Full Charge Auto Shut Off & a smart LED display to show battery life. Built-in Short Circuit, Over-Charge & Temperature Protection. Includes cables, tips, travel bad, built-in PC board & proprietary software. Complete with Battery Cell Activation Guarantee & Power Tips for Life Guarantee. Size is comparable to a RaZr? phone. Available in Red, White & Black.