Large LCD digital display for easy reading of speed, distance, and riding time. Compact, lightweight, wireless and waterproof design for convenient use and durable performance; measures speed, distance and riding time accurately. Day and night backlight with green and white illumination to distinguish lighting conditions and improve visibility. Slim, fashionable design with multi function capability; acts as a bicycle speedometer and odometer, measuring speed, distance and riding time. Widely compatible with all bicycle types: road cycling, mountain biking, folding bikes and standard bikes. Note: a slight rattle may be heard from the device; this is normal and caused by the wireless automatic function. Use scenarios Daily commutes and city riding to monitor speed and total distance while keeping a lightweight setup. Training rides and fitness tracking to measure riding time, pace and progress. Road or mountain rides to plan routes and monitor performance across different terrains.