این سنسور جهت تعیین سرعت دوچرخه بدون استفاده از GPS می باشد
Monitor your speed as you ride with this easy-to-install wireless sensor.
The speed sensor attaches to the hub of either wheel and
self-calibrates with your Edge® to give you accurate speed and distance
at all times, including indoors on the turbo trainer.
Simply attach the sensor and ride. With no magnets or other exposed
parts to line up, this sensor is easy to install, maintain and move