Gomadic Intelligent Compact Car / Auto DC Charger suitable for the Garmin Nuvi 660 - 2A / 10W power at half the size. Uses Gomadic 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 Garmin Nuvi 660) included with additional tips sold separately) Intelligent circuit provides precise output voltage and resistor configuration specific to the Garmin Nuvi 660. This ensures battery is safely and efficiently charged without affecting battery longevity. 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. Uses latest state of the art advancements in charging and surge suppression technologies to deliver a unique product in an unbelievably micro-sized form factor. Backed by the Gomadic Lifetime Warranty. This is a quality product that is built to be the last car charger you ever buy!