Details9.0 Wireless:~ Current speed, speed comparator, ride time, trip distance, dual odometer (for 2 wheel sizes), average speed, maximum speed, clock, and temperature. 4-line MacroMonitorª LCD displays up to 5 pieces of data at a glance. Digital wireless technology eliminates messy wires. Fits 25.4-31.8mm handlebars. Magnet fits up to 4mm bladed spokes.