Specifications: Small size, light weight, wireless waterproof design, more convenient and more durable. It is very suitable for measuring speed, distance and riding time that cyclists or sports enthusiasts want to know. Green and white distinguish day and night. Please note that due to the design of the wireless automatic function, a slight click sound from the device is normal. Easy to install, the display is installed on the handlebar, and the magnetic sensor can be fixed on the fork by a cable tie, and the distance should not exceed 60 cm. Applicable to all types of bicycles, such as road bikes, mountain bikes, folding bikes, ordinary bikes. Can also measure your distance and speed, record your trip. Item Name: Bicycle Stopwatch Speedometer Material: ABS, Silicone Features: Wireless, Waterproof, Bicycle Recorder Size: 4.6cm x 4.6cm x 1.8cm/1.81" x 1.81" x 0.71" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Code Meter 1 x Code Meter Base 1 x Wire Tie 1 x Code Meter Sensor 1 xFixed Connector 1 x Button Batteries (AG13 Button Battery) 1 x User Manual