Features:1. This is a very classic style Bicycle Speedometer, pure mechanical. 2. Easy to install. Left or Right Mountable, Resettable. 3. Universal for 26, 28, 29, 27.5 inch bicycles. 4. Accurate date, made of ABS material, lightweight and durable. 5. It works well to measure speed ,distance, riding time.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow slight deviation due to manual measurement.Specification:Type: Bike SpeedometerMaterial ABSColour: BlackFeature: mechanical, accurate data Suitable for: 26, 28, 29, 27.5 inch bicycles Bayonet size: about 2cm Feature:Left or Right MountableSpeed in RPMConnectingLis resettable includes:1 set x Bike Speedometer Kit About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.