Cateye Adventure AT200W Wireless Bike Computer 2016 Wireless bicycle computer is simple to use, durable, and full of convenient features ClickTec Plus single button design is intuitive and convenient, letting you scroll between display functions easily ID-coded wireless data transmission tracks data for two bikes via one computer unit; large screen simultaneously displays speed, time, and altitude functions Current speed to 65 MPH, total distance to 999,999 miles, two trip distances to 9,999 miles, elapsed time to 99:59:59, average speed to 65 MPH, and maximum speed to 65 MPH Dual tire size settings, 27-inch transmission distance, computer and sensor run on CR2032 X1 battery; measures 34 by 57 by 15 millimeters (W x H x D); 30-gram weight