Multifunctional Chinese and English display Waterproof full screen luminous bicycle code table. Track your speed, distan

[Material] engineering plastics, LCD display, electronic components, etc.; 

[Size] Head size 57*40*17MM, display size: 34*31MM;

[Power] Head: 1 section 3V CR2032 lithium battery (included)

Note: The available car requires a wheel diameter of 0CM-9999MM and a wire diameter of 2 mm;