Product name:Bike Computer Product size about : 60mm*45mm*20mm/2.36*1.77*0.79in Product color: As shown in the figure product features: 1. Touch screen display: The computer features a touch screen display that allows the rider to easily navigate and access different functions and settings. 2.19 functions: 19 functions including total mileage, single mileage, average speed, calories, clock display, maintenance indicator, menu cycle display, sleep clock display, backlight function (user selectable), real-time speed, temperature measurement, and so on. 3.Night Mode with Backlight: The device is equipped with a backlight feature that provides a clear display even in low light or night conditions. 4. Wired Connection: The odometer/speedometer is connected to the wheel or other parts of the bike via a wire. This allows accurate measurement of speed and distance. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Bike Computer 1 pc Magnet 1 pc Sensor 4 pcs Strips 1 pc Instruction manual