Auto Wake-up Function: After 300 seconds of no signal input, the device enters sleep mode and automatically wakes upon sensing vibration. Multi-functions: Measures speed, distance, riding time, and more, ideal for serious cyclists or fitness enthusiasts. Day & Night Backlight: Ensures easy viewing in dark hours with automatic activation when any button is pressed between 18:00 and 06:00. Easy to Install & Use: Simple installation process and user-friendly interface with two buttons to access all measurements. Compatibility: Works well on road bicycles, mountain bikes, folding bikes, and other common types. Experience the ultimate cycling companion with our wireless, waterproof speedometer designed for all conditions. Stay informed with multi-functional metrics while enjoying the ease of an automatic wake-up feature and customization to your bike's specifications.