Elites Drivo Direct Drive FE-C B+ Magnetic Turbo Trainer has set a new benchmark for home training. It is the most powerful & accurate direct drive trainer currently on the market. The Drivos Integrated Optical Torque System (OTS) Plus power meter uses technology exclusive to Elite trainers & is certified to be accurate to within less than 1%, making it the most accurate power measuring system available to the public. All Elite Drivos are tested & calibrated before shipping by using a Lorenz industrial torque meter. Once calibrated, an occasional software-based recalibration is all thats required; no sending your trainer back for recalibration. Thanks to the Drivos FE-C smart trainer protocol, the turbo will play excellently with a plethora of third party software such as Trainer Road & Zwift. The Drivos 6kg internal flywheel is geared up for high RPMs, which generates a smoother feel than ever before, while its super powerful & responsive magnetic resistance unit can generate over 2, 000 Watts & simulate grades of up to 24%. Coming with a complete suite of PC training software as well as a free lifetime subscription to Elites My Etraining APP, Elites Drivo connects to your computer or wireless device via both ANT+ & Bluetooth Smart. What is Zwift?