A small device that plugs into the USB port of your computer to provide a faster charge to a Smartphone or Tablet . Without this device, a standard computer USB port will only slow charge a Smartphone and in many cases not charge a Tablet at all. The intelligent circuitry within this booster detects the device connected and automatically switches to the full speed charging mode up to 2.1A. Features: - Compatible with all Smartphones & Tablets - Supports PC's & Mac®