2 Amp (10W) Mini Car / Auto DC Charger Compatible with Rio Karma - Amazingly small and powerful 10W design, built with Gomadic Brand TipExchange Technology Gomadic TipExchange Technology protects your investment by providing a means to change/upgrade your charger by simply swapping the physical charging tip. (Charging tip for Rio Karma) included with additional tips sold separately) Charger provides a full 10W (2,000mAh) of available current in a small form factor a little over 1 inch long. Flexible, straight cable measure 50 inches in total length. Intelligent circuit provides precise output voltage and resistor configuration specific to the Rio Karma. This ensures battery is safely and efficiently charged without affecting battery longevity. Power Sleep"" feature will cut power draw of charger by over 99% when not in use. Charger will draw less than 0.1W of power when in ""ready state"" (e.g. not connected to the Rio Karma). Built using high quality capacitors and circuit components to ensure that charging current does not interfere with FM radio transmissions. Rigorous Q&A process.