Features:
Mechanical odometer, no battery requires, easy to use, precise measurement.
Made of good quality materials, sturdy and durable, waterproof, suitable for all weathers to use.
Suitable for 26in, 27.5in, 28in, 29in bikes. Easy to install.
Let you know the total mileage, single mileage, MPH.
With a reset knob, swivel it to make the data clearing.

Specification:
Material: Plastic
Color: as picture shown
Size: Approx. 12*8*5.5cm/4.72*3.15*2.16in
Weight: Approx. 342g

Package List:
1 x Mechanical Odometer
1 x Cable
1 x Adapter