Feature●BICYCLE SPEEDOMETER ODOMETER: No battery requires, easy to use, precise measurement.●GOOD QUALITY MATERIALS: Bike speedometer mph is sturdy and durable, waterproof, suitable for all weathers to use.●SUITABLE FOR: Bike speedometer odometer suitable for 26in, 27.5in, 28in, 29in bikes. Easy to install.●MULTIPLE DATA: Let you know the total mileage, single mileage, MPH.●RESET KNOB: Swivel it to make the data clearing.Description