Bike Speed 2 Sensor

• Compact sensor to monitor your speed and boost your training
• Attaches to hub and self-calibrates with your Garmin device
• Measures speed by tracking rotation of wheel constantly
• Slim profile doesn't interfere with your ride
• Wirelessly transmits data via both Bluetooth 4.0 and ANT+
• Mounts with included band, skipping fiddly magnets and mounts