About this item BLE 4.0 & ANT + TECHNOLOGY - Connect the speed and cadence sensor to your bike computer/indoor trainer via ANT+ and connect to smart device apps via Bluetooth. REAL-TIME DATA - Tracking cadence /speed data in real-time on your bike computer, smartwatch, and smartphone with compatible training apps. EASY TO INSTALL - NO magnets needed, the cadence sensor attaches to the left crank of your bike, the speed sensor attaches to the wheel hub. WIDELY COMPATIBLE - The moofit speed and cadence sensor compatible with most of the mainstream fitness APPs, such as Zwift, OpenRider, E-lite HRV, RideWithGPS, Cyclemeter, Peloton, Rouvy, etc. (MooFit app Unavailable) ATTENTION: You can"'"t pair the two sensors with the Wahoo app at the same time, because Wahoo makes the brand connection restrictions, you can only pair one sensor one time, except for Wahoo itself brand sensors.