Feature:1. There is 2 unit system, suitable for the hobbies of different users at home and abroad2. Having a stylish design, with rainproof function, easy to disassemble, giving you a good experience3. With luminous function and high-brightness cold light source, you can check information during night riding4. Can display mileage, cycling time, real-time speed, time, and maintenance tips to ensure the performance and life of your bike5. With simple installation, easy to use, small size does not take up too much space, to meet your needsSpecification:Item Type: Bike ComputerBattery: 1 x CR2032 Button Battery 220 Mah (built-in battery)Display: LCD DisplayDisplay Size: Approx. 7.3 x 1.7cm / 2.9 x 0.7inLine Length: Approx. 82cm/32inProduct Size: Approx. 9 x 4.5 x 1.5cm / 3.5 x 1.8 x 0.6inFunctions: Driving Speed, Total Driving Distance, Single Driving Distance, Maximum Driving Speed, Average Speed, Accumulated Driving Time, Single Driving Time, Single Travel Time, Clock, Stopwatch, Measuring External Environment Temperature Function, Travel Time Counts Up/Down, Mileage Countdown, Comparison Reminder, Speeding Reminder, Fueling Reminder, Driving Data Sampling Function, Low Battery DisplayScope of Application: Suitable for 4"-40" Bicycles/Electric Vehicles, Motorcycles.Package List:1 x Bike Computer 1 x Securing Clip1 x Magnet2 x Screw2 x Nut3 x Fixed Components1 x Connection Line6 x Tie1 x User ManualNote:Built‑in Battery Delivery