Gomadic High Output Home Wall AC Charger designed for the GoPro HERO / HD / HERO2 with Power Sleep technology - Intelligently designed with Gomadic TipExchange Power Sleep"" feature reduces vampire power draw 99%. Charger will consume less than 0.1W of power when in ""dormant state"" (e.g. not connected to the GoPro HERO / HD / HERO2). Gomadic Powerful High Wattage wall charger for home or travel use. Customized circuit design is based on the latest in power regulation and is tailored to the precise output voltage and resistor ID requirements of the GoPro HERO / HD / HERO2 (accurate to 0.1v!) Advanced state-of-the-art internal circuitry protects the GoPro HERO / HD / HERO2 from power surges, overcharging, and short-circuiting, to significantly extend the internal battery lifecycle. Specification: Input Voltage (100 - 240vAC), Cable length (50 inches), Transformer Dimensions (2.0 X 1.75 inches), Foldable Adapter (Yes), Circuit Design (GoPro HERO / HD / HERO2 Specific) Foldable wall outlet plug makes for a very compact, portable design. Advancements in power circuit miniaturization now gives you an amazingly powerful charger for its size.