The Nike+ SportWatch GPS offers you a new running experience. The GPS receiver works in tandem with the shoe-based Nike+ Sensor to deliver highly accurate pace and distance data while in-run. Adds personalization and motivational features to the running experience, including audible sounds, challenges, run reminders and more. Connects directly via your PC or Mac to www.nikeplus.com. Water resistant up to five ATM (50 meters).
what is the black usb cord for? I thought the watch went straight into the computer.