Intelligent Dual Purpose DC Vehicle and AC Home Wall Charger suitable for the Garmin Montana 680 / 680t - Two critical functions, one unique charger - Uses Gomadic Brand TipExchange Technology Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the Garmin Montana 680 / 680t. This ensures battery is safely and efficiently charged. 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 Montana 680 / 680t from being damaged by power surges, overcharging and/or short-circuiting. 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). Backed by Gomadic Lifetime Warranty. This is a quality product that is built to last forever!