Timex IRONMAN GLOBAL TRAINER GPS SPEED and CADENCE SENSOR :: You're sure to pick up your pace when you can monitor your pedaling with the Timex IRONMAN Global Trainer GPS Speed and Cadence Sensor. Self-calibrating and wireless, it measures and reports your pedaling strokes per minute.
Transmits cycling data with ANT+ technology
Mounts on rear half of bike on side opposite chain
Includes instructions, magnets and mounting hardware
Compatible with Ironman Global Trainer Bodylink System