Interactive, Zwift compatible trainer.The Vortex is an interactive Smart trainer with an electro brake. This resistance unit is suitable for an average training level and can reach a maximum resistance is 950 Watt. Instead of using a handlebar computer you train by connecting the Vortex quickly and easily to the Tacx Cycling apps. If you want to train with a PC or laptop you can purchase the Upgrade Smart. Of the many possible training options, you can choose the software that best matches you and your way of training. The Vortex communicates wirelessly via ANT+ and Bluetooth wireless technology. You can attach your tablet or smartphone to your handlebar with a special bracket (optional).Features: ANT+, Bluetooth and FEC compatible (basically automatically works with all wireless protocols) Steel roller with sound deadening rubber compound Quick release bike mounting Simulates 15% inclines Max resistance 950 watts Works with; Garmin GPS (520 with updates for others soon) i-phone i-pad Android PC Compatible software; Tacx Apps (Free) and PC software Zwift (Free beta software) Trainer Road Kinomap BKool FoldableIdeal for: Indoor winter training for real life riding simulations on a budget All year, Indoor power measurement and testing on a budgetThere are two ways of using the trainer. Plug it in the wall and have a fully interactive simulator, which works with all types of third party hardware and software Dont plug it in and dont use a third party accessory. Act just like a smooth flat road but the harder you go the harder it gets.