Monitor your performance as you ride with this easy-to-install, wireless speed and cadence sensor bundleANT plus and Bluetooth compatibleThe cadence sensor fastens to any size crank arm and tracks pedalling strokes per minute, so you can train for your optimal performanceThe speed sensor attaches to the hub of either wheel and self-calibrates with your Garmin Edge to give you accurate speed and distance at all times, even when indoors on the turbo trainer, or in areas where GPS signal is interruptedBundle includes speed sensor, speed sensor sleeve, cadence sensor, cadence sensor straps, manual