Product Name: Bicycle Computer Wired Computer with Night Light Backlit Touch Screen Material: PC+ABC casing / electronic components Color: Black, Red, White Display: LCD touch screen Power source: Replaceable button battery Packaging weight: 80g Packaging size: Boxed 13.5cm*9.1cm*2.5cm 668 Wired 19 Function Total mileage Single trip mileage Average speed Maximum speed Calories Clock display Maintenance tips Menu loop display Sleep clock display Tire circumference setting Kilometer/mile selection Temperature measurement Cycling time Automatic wake-up during cycling Data storage for battery change lasts 20 seconds Backlight function is user-selectable Real-time cycling speed display Speed comparison prompt Low battery mode after 300 seconds of no cycling