The Kettler Unix S is supplied with a 22kg (48.5lbs) flywheel ensuring smooth operation & features an induction brake system with a power range from 25-400 Watts. It incorporates the smartphone technology that allows for downloading the free Kettler SFit application to enjoy a huge variety of challenging programmes. in addition, the Unix S enables you to connect the PC to the cross trainer by Bluetooth & access the optional Kettlers World Tour 2 software. The console offers feedback on important workout functions, while the heart rate can be measured with an integrated Polar pulse receiver & an included chest strap.