Garmin Speed Sensor 2. Wireless speed sensor, easy to install as it works without magnets or other exposed parts, and they can easily be changed to another bike. It is connected to the hub of either wheel and self-calibrates with your Edge^® cycling computer or compatible device to give you accurate speed and distance at all times. The ANT+®connectivity and Bluetooth® Low Energy technology allow you to send speed and distance data to the Garmin Connect™ virtual community and other training Apps, compatible devices and exercise equipment in obtain improved data indoors as well as outdoors. The odometer function carries out a monitorisation of the distance covered to help plan the maintenance of the bike.