This interactive trainer offers the most advanced brake of all the Tacx trainers with rear-wheel drive, so you can enjoy a highly realistic cycling experience. The motor brake is able to apply a maximum power of 1500 W to the back wheel & will speed up during a descent. The slopes simulated are realistic up to 20% & down to -5% for descents. The Genius communicates via ANT+ & Bluetooth Smart for convenient training sessions using your smartphone or tablet. Performance data can be viewed on several devices simultaneously, including your smartphone, bike computer & sports watch. The Genius offers ease-of-use & freedom of choice. When the Genius Smart isn’t connected to a smartphone, tablet or computer, it behaves as a fluid trainer. This means the trainer behaves progressively: when your speed increases, the resistance increases as well. So it is possible to use this trainer in a “st&-alone” status.