Intelligent Dual Purpose DC Vehicle and AC Home Wall Charger suitable for the Garmin nuvi 2557 / 2577 / 2597 LMT - Two critical functions, one unique charger - Uses Gomadic Brand TipExchange Technology Broad input voltage range of 12-24VDC and 100-240VAC respectively. Permits charging via vehicle and home outlets worldwide! State of the art, advanced circuitry prevents the Garmin nuvi 2557 / 2577 / 2597 LMT from being damaged by power surges, overcharging and/or short-circuiting. Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the Garmin nuvi 2557 / 2577 / 2597 LMT. This ensures battery is safely and efficiently charged. Charger provides a full 1 AMP of available charging current. Flexible, straight cable measures an ample 42 inches in total length. A best-selling product from Gomadic Corp, one of the leaders in consumer electronic charging accessories.