High Definition Display: Clear, large-screen LCD for easy data viewing Durability: IPX5 Waterproof - No fear of rainstorms or bad weather. Enjoy unlimited riding without concerns about the elements. Screen Size:39mm x 48mm Product Size:46mm x 64mm x 13mm Weight:44g Battery Capacity:210mAh Endurance:Up to 10 hours Waterproof Grade:IPX5 Backlighting:Automatic Time Calibration:Automatic Stand Out Features: Smart Riding Companion Instant Speed Single Mileage Total Mileage Cycle Through Functions Clock Ride Time Average Speed Two-Car Data Storage Automatic Sleep Mode Full-Screen Luminous Display Electricity Reminder Life Waterproof Advanced Metrics: Heat Consumption Wheel Speed Temperature Monitoring Colour:Black Material:Plastic Package Contents: 1 * Wireless Bicycle Computer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Bicycle Computer Bike Speedometer Bicycle Computer Wireless Bicycle Computer Bike -Sensor