Gomadic High Output Home Wall AC Charger designed for the Nike SportWatch GPS with Power Sleep technology - Intelligently designed with Gomadic TipExchange 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 Nike SportWatch GPS (accurate to 0.1v!) 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 Nike SportWatch GPS). Advanced state-of-the-art internal circuitry protects the Nike SportWatch GPS from power surges, overcharging, and short-circuiting, to significantly extend the internal battery lifecycle. Uniquely engineered in a small, lightweight, and highly portable design, the Gomadic Nike SportWatch GPS Wall Charger travels easily, saving both space and time. TipExchange Technology protects your investment, by providing a means to change/upgrade your charger by simply swapping the physical charging tip. (Charging tip for Nike SportWatch GPS) included with additional tips sold separately)