Our Bike Speedometer is made of quality material with fine process. It's lightweight, portable, durable, waterproof, resistant to high and low temperature. The screen is luminous and clearly display the time, average speed, maximum speed, distance, etc. And support for five language systems:English,Deutsch,France,Dutch,Espanol. Wide Application,suitable for most types of bicycles: mountain bikes, road bikes, electronic bikes, folding bikes, ordinary bikes. Specification: Material: Plastic Color: Black Weight: 65g Application: MTB,Road Bike Version Backlight: Green Backlight Size: Approx. 6x4.4x1.5cm/2.36x1.73x0.59in Language: English,Deutsch,France,Dutch,Espanol Waterproof: Can be used in rainy day not under the water. Package Includes: 1x Bike Speedometer Set"