Product name:Bike Computer Product size about : 5.6*2cm/2.20*0.79in Product color: As shown in the figure Product material:PVC product features: 1. Accurate Measurement: This bicycle computer provides precise speed tracking and total mileage calculation and other functions, ensuring reliable data for your cycling activities. 2. Night Glow Display: Equipped with a night glow feature, the computer offers enhanced visibility during nighttime rides, allowing you to monitor your speed and distance in low-light conditions. 3. Waterproof Design: The computer is designed to be waterproof, making it suitable for use in rainy weather and ensuring durability and long-lasting performance. 4. Sleek Black Finish: With a stylish black color and a round shape, this speedometer adds a sleek and modern look to your bike's accessories. 5. Large Screen: The speedometer features a large screen for easy reading, providing clear and visible information on your speed, distance, and total mileage while cycling. 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. Package includes: 1 pc Bike Computer 1 pc Magnetic head 1 pc Instructions 1 pc Wired sensor 5 pcs Cable ties