Size Instruction: Since sizes can vary between brands. Please refer to the following size chart, measure your heel-to-toe length and than choose the size fit your best. Please pay attention to the distinction between men and women size.
Switch Instruction: Hidden switch button beside the charging port. Press it to switch on. With each press,it changes to another light mode. Press the switch for 14 times to turn the light off , or keep pressing for 3 seconds to turn off the power.
Light Modes: light on from 1.red(steady) -2.blue(steady) -3.green(steady) -4.purple(steady) -5.skyblue(steady) -4.yellow(steady) -7.white(steady) -8.white(twinkle) -9.auto-change mode -10.red-rotation mode -11.blue-rotation mode -12.green-rotation mode -13.red-rotation mode -14.light off
Charge Instruction: Easy charge like your cell phone with the attached USB charging cable.Switch on the shoes when received and light up until all power gone. Then charge both shoes for 3 hours.