The adidas C-21 exercise bike is a sleek and sturdy training partner with a 9kg (20lbs) flywheel delivering a smooth cycling motion. For adjusting intensity of each session, there are 24 levels of computer-controlled magnetic resistance, and the bike has direct resistance keys on the console ensuring easy selections. The C-21 offers an intuitive console with a user-friendly LCD display providing feedback on key workout data. To let you build cardio endurance and enjoy challenging and effective workouts, it has a selection of 15 programmes, and there are 4 user profiles (each with age / gender / weight / height) for more personalised feedback. Heart rate measurement can be easily achieved with hand pulse sensors or a Bluetooth Smart wireless receiver and an included chest belt. For quick access to all your entertainment must-haves, the C-21 features an integrated tablet/smartphone holder and stereo speakers with Bluetooth connectivity. Plus, for instant motivation, there is signature adidas red LED lighting that powers up when you create energy.