Youshe Bicycle Computer Waterproof Cyclocomputers LED Display 24 Functions Computer Odometer Speedometer Digital Bicycle Accessories Real-time display of the current speed,trip distance,riding time,trip time,calorie consumption and current time. Easy view of the maximum speed,average speed ,total riding time, total riding distance and rotations per miunte of the wheel. Multiple purposes for bicycles/motor-bicycles(4"-40"). Modern look, waterproof and portable. Imported sensors to provide stable performance, and accurate speed.