Large Display: Features a 2.8-inch screen, providing clear and easy-to-read data at a glance while cycling Waterproof Design: Engineered with a waterproof build, ensuring reliable performance in all weather conditions Durable Material: Constructed from high-quality ABS material, the built-in 400mAh battery, offers durability and resistance to wear and tear Lightweight & Compact: Weighing just 93g, Size: 5 x 1.4 x 7.3cm, this odometer adds minimal weight to your bicycle, making it ideal for all types of riders Comprehensive Cycling Data: Tracks a wide range of cycling data, including speed, distance, and more, helping cyclists to monitor and improve their performance Faults and Their Causes: Speed remains at 0 during riding (The magnet and sensor angle or distance is not installed correctly). Incorrect display values during use (Remove the battery, wait for 10 seconds, then reinstall it). The display screen goes black (Long exposure to sunlight, return to normal after placing in a dark area for some time). Display numbers are incomplete (Poor battery contact or battery is dead, check battery installation or replace the battery). Dim display screen (Battery power is low, replace with a new battery).