Feature: 1. There is 2 unit system, suitable for the hobbies of different users at home and abroad 2. Having a stylish design, with rainproof function, easy to disassemble, giving you a good experience 3. With luminous function and high-brightness cold light source, you can check information during night riding 4. Can display mileage, cycling time, real-time speed, time, and maintenance tips to ensure the performance and life of your bike 5. With simple installation, easy to use, small size does not take up too much space, to meet your needs Specification: Item Type: Bike Computer Battery: 1 x CR2032 Button Battery 220 Mah (built-in battery) Display: LCD Display Display Size: Approx. 7.3 x 1.7cm / 2.9 x 0.7in Line Length: Approx. 82cm/32in Product Size: Approx. 9 x 4.5 x 1.5cm / 3.5 x 1.8 x 0.6in Functions: 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 Display Scope 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 Manual Note: Built‑in Battery Delivery