Bluetooth and ANT+(FE-C) connectivity is built into the unit and will sync to your smartphone or tablet, letting you relay your RPMs, BPMs and cadence to your device for immediate analysis. Using third-party apps such as the Tacx Desktop app and Zwift, you can also fully immerse yourself in VR rides, adding as realistic a feel to every run as possible. Alternatively, you can ride in stand-alone mode and burn through your own workout, without virtual assistance. Performance-wise, the Flux S features a redesigned internal setup which has improved the accuracy of its power measurements to within 3%, a 7kg flywheel that provides true-feeling inertia and an almost silent motion and a direct drive, easy-access mounting setup that is compatible with bikes with long cage derailleurs. Powerful, intelligent and precise indoor workouts are assured with this terrific Tacx trainer.