Featuresr 27 inch large screen display system with touch button design for convenient user main bike modes spd avs max dst odo cal prm rt tt rat etcr small size and lightweight as a bicycle speedometer and odometer measuring speed distance and riding timer allow two sets of wheel diameters and other data for bicycle a and bicycle br speeding alert for your riding safety low voltage and maintenance reminder function designed for long distance cyclingr wide range of applicati