As a practical equiment for your Motorcycle. Engine trouble light reminding. Displaying time. travel distance. Waterproof, -proof, durable. Easy installation and simple operation. Product Name: Motorcycle Odometer Operating voltage: 10V-15V Speed calibration: 42.5Hz corresponds to 60KM/H Speed calibration: 166Hz corresponds to 10*1000r/min LCD screen: 7 colors backlight short press to switch Needle Display Rpm Range 0-15000. Voltage: Less than 11.3V undervoltage flashes, higher than 11.7V undervoltage is not displayed colour:Black Material:plastic Package Contents: 1 x LCD odometer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.