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