Automatic reading of resistance level. Integrated ANT + and Bluetooth Smart sensor for speed, cadence and power. My E-Training application grantis for 6 months. "Training in stages" without limit. Sending speed, cadence and power data to other ANT + and Bluetooth Smart compatible devices and applications. High resistance magnetic unit and 8-level sequential switch. Equipped with Qubo frame and Crono compass system for simulation of the driving compartment on the road (weight / power). Compatible with bikes from 20 "to 29". Fast Fixing fastening system.