Features1UNIVERSAL AND PRACTICAL: This high end speedometer is a universal mechanical speedometer for bicycles, tricycles, and bikes, important bicycle equipment 2ACCURATE MEASUREMENT: Pure mechanical speedometer, provide accurate data, suitable for 26 28 29 27.5in bicycles 3STRONG MATERIAL: Made of durable aluminum alloy, strong, light weight, possess high strength and good corrosion resistance 4CONVENIENT READING: Allow you to feel fast and passion, riding data at your fingertips for your convenience, useful and practical 5CORROSION RESISTANT PLASTIC: Made of plastic material, has strong corrosion resistance, waterproof, and a good insulatorSpecificationItem Type: Bicycle SpeedometerMaterial: Plastic, aluminum alloyPackage List1 x Bicycle Speedometer(batteries not included)