Every pair comes from professional team who focuses on US domestic market for 16 years,we have deep insight on our user's right size.
Size Instruction:Please click the "size drop-down list" we measure insole length in detail to choose your size.
Light Modes:The totle of 7 colors with 11 different modes.Light on from 1.red(steady) -2.green(steady) -3.blue(steady) -4.yellow(steady) -5.skyblue(steady) -6.purple(steady) -7.white(steady) -8.white(twinkle) -9.auto-change mode -10.neon-rotation mode -11.rotation-twinkle mode-12.light off
Battery will last 7-8 hours while the lights are on.
For more details,please roll the mouse to the "Product Description"