ezyoutdoor Bike Computer- Bike Bell- Waterproof Wired Bicycle Speedometer Odometer Leisure 14 Functions LCD Display MTB Bicycle Computers Cycling Functional Bicycle Odometer BIG LARGE SCREEN - Large LCD Screen Display With Soft Backlight, You can read your statistics easily and clearly Day or Night Riding.Real-time display of the current speed,trip distance,riding time,trip time,calorie consumption and current time;Easy view of the maximum speed,average speed ,total riding time, total riding distance and rotations per miunte of the wheel AUTO WAKE-UP FUNCTION - Built-in Ball Switch, automatically turn on from sleeping mode when sensing the vibration after shocking bike computer body, easier to operate than conventional bike odometer.Options of 12h/24h systems,stopwatch feature and alert feature for bicycle maintenance;Length unit options of klometer/mile. WIRED & WATERPROOF - Small Size, Light Weight, Wired & Waterproof design make the bicycle odometer more convenient and durable. It works well to Measure Speed, Distance and Riding time, especially suitable for cyclingor fitness enthusiasts.Imported sensors to provide stable performance, and accurate speed;Multiple purposes for bicycles/motor-bicycles(4"-40");Modern look, waterproof and portable EASY TO INSTALL - It is easy to follow instructions, great basic functions of the speedometer and very specific tire size that enable accurate calculations.Real-time indication of acceleration or deceleration for easy control of your speed;Size (Computer Console): 4.5 x 4 x 1.1 cm;Size (LCD Display): 3 x 2.5 cm;Sensor Cable Length: 85cm WIDELY USE - Applicable for Mountain BikesRoad Cycling, Folding Bike, Common Outdoor Bicycle, Electric bikes and motorcycle.Package included:1 x Cycling Odometer +1 x Bike Bell(NOTE:Batteries are NOT included because it is very dangerous to packed with batteries in international shipping service and hope you will understand);Lifetime Warranty;7-15 business days delivery date with tracking number