Intelligent Dual Purpose DC Vehicle and AC Home Wall Charger suitable for the Literati Color eReader - 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! Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the Literati Color eReader. This ensures battery is safely and efficiently charged. State of the art, advanced circuitry prevents the Literati Color eReader from being damaged by power surges, overcharging and/or short-circuiting. When used in vehicle charging mode, high quality capacitors and circuit components ensure that charging current will not interfere with FM radio reception. Backed by Gomadic Lifetime Warranty. This is a quality product that is built to last forever!