Advanced Rapid Wall AC Charger Compatible with Barnes and Noble nook Original eBook eReader - Amazingly powerful home charge design built with Gomadic Brand 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 Barnes and Noble nook Original eBook eReader). 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 Barnes and Noble nook Original eBook eReader (accurate to 0.1v!) Advanced state-of-the-art internal circuitry protects the Barnes and Noble nook Original eBook eReader from power surges, overcharging, and short-circuiting, to significantly extend the internal battery lifecycle. Charger works on power voltage levels worldwide by supporting a wide input range of 100-240v AC / 50-60 Hz. Specification: Input Voltage (100 - 240vAC), Cable length (50 inches), Transformer Dimensions (2.0 X 1.75 inches), Foldable Adapter (Yes), Circuit Design (Barnes and Noble nook Original eBook eReader Specific)