Garmin Speed Sensor 2 (New - 850/550/1050 compatible) Monitor your speed as you ride with this easy-to-install wireless sensor. With no magnets or other exposed parts to line up, this sensor is easy to install, maintain and move between bikes. The speed sensor 2 attaches to the hub of either wheel. You can set up wheel size in the Garmin ConnectT online community or self-calibrate with an Edge cycling computer or compatible Garmin device. Once set up you'll get accurate speed and distance at all times even without a head unit. ANT+ connectivity and BLUETOOTHANT+ connectivity and BLUETOOTH Low Energy technology let you sync to Garmin Connect and other training apps, compatible devices and fitness equipment for better data when you ride indoors and outdoors. Compatible with Any Ant+ Device No Magnet: Nothing to Line Up Easy to Move Between Bikes Compact and Out of The Way Reliable Low Power Usage Compatibility: Edge Series Edge 1000 Edge 1030 Edge 1030 Plus Edge 1040 Edge 1040 Solar Edge 1050 Edge 130 Edge 130 Plus Edge 500 Edge 510 Edge 520 Edge 520 Plus Edge 530 Edge 540 Edge 540 Solar Edge 550 Edge 800 Edge 810 Edge 820 Edge 830 Edge 840 Edge 840 Solar Edge 850 D2 Series See chart on Garmin AU site eTrex Series See chart on Garmin AU site Fenix Series See chart on Garmin AU site Forerunner Series See chart on Garmin AU site > GPSMAP Series See chart on Garmin AU site MARQ Series See chart on Garmin AU site Oregon Series See chart on Garmin AU site tactix Series See chart on Garmin AU site Varia Series See chart on Garmin AU site Venu Series See chart on Garmin AU site VIRB Series See chart on Garmin AU site vívoactive Series See chart on Garmin AU site