Garmin’s Bike Speed Sensor 2 is easy to install & involves no magnets or exposed parts. The sensor is easy to set up & you can set up wheel size using the Garmin Connect app for enhanced accuracy. The sensor self-calibrates with an Edge cycling computer or compatible with Garmin devices Compatible Devices The Bike Speed Sensor 2 & Cadence Sensor 2 are compatible with the following Garmin devices: Fenix 3 Sapphire, Edge 1000, Edge 1030, Edge 130, Edge 510, Edge 520, Edge 520 Plus, Edge 530, Edge 800, Edge 810, Edge 820, Edge Explore, Edge Explore 820, Fenix 3, Fenix 5, Fenix 5 Plus, Fenix 5S, Fenix 5S Plus, Fenix 5X, Fenix 5X Plus, Forerunner 230, Forerunner 235, Forerunner 245, Forerunner 245 Music, Forerunner 35, Forerunner 45, Forerunner 45S, Forerunner 620, Forerunner 630, Forerunner 645, Forerunner 645 Music, Forerunner 935, Forerunner 945, VIRB 360, VIRB Ultra 30, VIRB X, VIRB XE, Vivoactive 3, Vivoactive 3 Music, Vivoactive HR