Gomadic High Output Home Wall AC Charger designed for the Amazon Kindle (1st Generation) 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 Amazon Kindle (1st Generation)). Advanced state-of-the-art internal circuitry protects the Amazon Kindle (1st Generation) from power surges, overcharging, and short-circuiting, to significantly extend the internal battery lifecycle. 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 Amazon Kindle (1st Generation) (accurate to 0.1v!) Uniquely engineered in a small, lightweight, and highly portable design, the Gomadic Amazon Kindle (1st Generation) Wall Charger travels easily, saving both space and time. Specification: Input Voltage (100 - 240vAC), Cable length (50 inches), Transformer Dimensions (2.0 X 1.75 inches), Foldable Adapter (Yes), Circuit Design (Amazon Kindle (1st Generation) Specific)