Features: Accurately track your cycling speed with this vintage bike speedometer, featuring high precise sensors for reliably data even on challenging terrains, crafted from aluminum alloy for long lasting performances. This cycling computer boasts a lightweight yet robust aluminum alloy construction, offering superior impacts resistance compared to plastic models, combined with a retro aesthetic that celebrates bicycles heritages. Ideal for both professional riders seeking precise training and outdoor enthusiasts who appreciate durability gear, this bicycles odometer caters to cyclists valuing reliability and distinctive vintage styles. Perfectly suited for mountain trail adventures, commutes, and extended bicycles tours, this speed measurement tool provides essential real time data across diverse riding environments. Experience effortless setup with tool less installation in seconds, making this retro styled cycling accessory exceptionally user friendly for beginners and convenient for riders needing frequent device adjustments. Specifications: Component: Aluminum alloy Size:Approx.12x5.5x8cm/4.72x2.16x3.15inch Styles:Square/Round Package Includes: 1pcs Analog Cycling Speedometer 1pcs Installation Bracket note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.