Features: Wireless Convenience: The wireless speed cycling odometer eliminates the hassle of tangled wires, allowing for a clean installation on any bike, whether it's a road or mountain bike. Large Display Screen: Enjoy a clear view of your cycling stats with a large display screen that showcases speed, distance, and time, making it easy to track your performance at a glance. Automatic Backlight: The cycling computer features an automatic backlight that activates in low-light conditions, ensuring you can read your metrics easily during evening rides or in shaded areas. Waterproof Design: This digital bicycle speedometer is built to withstand the elements, with a waterproof design that ensures reliable performance during rainy rides or outdoor cycling adventures. Versatile Compatibility: Designed for both road and mountain bikes, this cycling odometer is perfect for any cycling enthusiast, making it an essential tool for tracking your rides and improving your performance. Specificatiosn: Material: ABS Size: 5.5*5.9cm Power Suply: USB Charging (USB Cable Included) Note: Due to the screen lighting effect, the actual color of the product may be slightly different. Due to manual measurement, please allow size error. Include: 1*Odometer 1*USB Charging Cable 4*Rubber Rings 1*Rubber Pad 1*Fix Mounts