1. Dynamically display the driving mileage, riding time, real speed etc. 2. Examine the total driving mileage, total riding time and the fastest speed. 3. Thermometer and clock function. 4. Prompt the voltage of battery. 5. Auto prompt the maintenance of bicycle. 6. Prompt the add subtract speed dynamically, over speeding warning. Its safer. 7. Lamp when in the night, each item of data can be grasped at any moment. 8. Modern design, waterproof and portable. 9. Voltage: DC 3V 10. Battery Model: CR2032 (included) 11. Screen dimensions: 72x16mm 12. Size: 90x48x22mm
