Magnet free sensor are much more reliable and do not drop data like magnet based sensors. Stages magnet-free Speed sensors fit to your hub to provide real-time, accelerometer-based speed data to your cyclometer or phone via ANT+ and Bluetooth Smart.
-Compatible with most wheels
-Installs/removes in seconds
-IPX7 Water Resistant
-Superlight – just 8 grams
-Runtime: 600 hours
-Operating range: 2-60 mph
-Blue and red LED’s indicate pairing, activation and low battery status
