Size:4*6cm LCD Digital DisplayThe large LCD display guarantees you can read your statistics from the bicycle speedometer easily. Multi-functions:Small Size, Light Weight, Wireless & Waterproof design make the bicycle odometer more convenient and durable. It works well to Measure Speed, Distance and Riding time, especially suitable for cyclingor fitness enthusiasts. Easy to Install &Use:Simple installation that only takes a few minutes. Easy to navigate interface with only two buttons to access all measurements. Customizable to most common tyre sizes for accurate stats tracking. Applicable:Road bicycles, mountain bikes, folding bikes,and other common bicycles are compatible with this bicycle computer. This bicycle computer MAY NOT be compatible with some electric-assist bicycles. If the computer display, sensor, and magnet can be installed within the specified distances device should be fully compatible. Please do not hesitate to contact us with any questions.