Advanced Gomadic 2 in 1 Auto / Car DC Charger Compatible with Jabra FREEWAY with Foldable Wall AC Charging plug &ndash; Amazing design built with TipExchange Technology State of the art, advanced circuitry prevents the Jabra FREEWAY from being damaged by power surges, overcharging and/or short-circuiting. Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the Jabra FREEWAY. 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! A best-selling product from Gomadic Corp, one of the leaders in consumer electronic charging accessories. Backed by Gomadic Lifetime Warranty. This is a quality product that is built to last forever!