Advanced Gomadic 2 in 1 Auto / Car DC Charger Compatible with GoPro HERO / HD / HERO2 with Foldable Wall AC Charging plug &ndash; Amazing design built with 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 GoPro HERO / HD / HERO2 from being damaged by power surges, overcharging and/or short-circuiting. Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the GoPro HERO / HD / HERO2. This ensures battery is safely and efficiently charged. Backed by Gomadic Lifetime Warranty. This is a quality product that is built to last forever! When used in vehicle charging mode, high quality capacitors and circuit components ensure that charging current will not interfere with FM radio reception.