Gadget Guide
The Wahoo Fitness Blue SC is a Bluetooth 4.0 bike sensor for the iPhone 4S that pairs with cycling apps such as Cyclemeter and Strava so cyclists can easily monitor their critical data – including speed, cadence, location, map, time, pace, calories and workout history. The internal odometer also records bike mileage in weekly, monthly, yearly and lifetime totals.
US$59.99 + shipping
Wahoo Fitness www.wahoofitness.com 
