Feature:1. Wired and wireless models to meet different Cycle needs.2. Integrated with multiple functions, including instant speed display, maintenance reminder, automatic wake-up, etc.3. Waterproof design, suitable for all weather conditions.4. Power-saving mode, automatically enter without Cycle for 300 seconds, extending battery life.5. Improved sensor, accurate speed measurement with single installation tube.Specification:This bicycle odometer with functions such as instant speed display, maintenance reminder, automatic wake-up, and waterproof design. It is an ideal choice for Cycle enthusiasts.Features:Wired and wireless models to meet different Cycle needs.Integrated with multiple functions, including instant speed display, maintenance reminder, automatic wake-up, etc.Waterproof design, suitable for all weather conditions.Power-saving mode, automatically enter without Cycle for 300 seconds, extending battery life.Improved sensor, accurate speed measurement with single installation tube.Specifications: Style: Wired / Wireless (Optional)Colour: Black / White (Optional)Battery: 1*2032 button batteryWaterproof : YesWired version:Size: 14.0*9.1*2.6cm / 5.5*3.6*1.0inWeight: 90.5g / 3.2ozWireless version:Size: 16.3*9.5*5.5cm / 6.4*3.7*2.2inWeight: 133g / 4.7ozPackage list: 1*Set Bicycle Odometer Package List:1*Set Bicycle Odometer