SPEED OR CADENCE SENSOR - Easy to swtich the mode between speed and cadence. Just simply reset the battery, blue light indicates cadence sensor and red light inditates speed sensor. Note that this can not track your speed and cadence simultaneously. | DUAL BAND BLUETOOTH & ANT+ - Integrated with Bluetooth and ANT+, works with most popular ANT+ bike/GPS computers and iOS and Android cycling apps. | APP COMPATIBLE- Works with popular apps including Zwift, Rouvy, RidewithGPS, Peloton,Openrider, tacx,TrainerRoad, Wahoo and others. | MAGNET-LESS CADENCE - No magnets, wireless sensor, easy to install. Verify that your speed sensor is on by spinning the wheel it measures. | NOTE - We wouldn’t recommanded you to use it on spinning bikes as the magnetism and the metal plate of the spin bike will interfere the signal of cadence speed sensor causing inaccurate readings.