... shoelace with green ledlight up led shoelace,round elastic shoelaces,light-up LED colorful flashing shoelace,LED colorful flashing shoelace , ... red,yellow,green,orange,etc3,Battery:2CR203 2 button batteries4,switch:constant shining+fast flashing+slow flashing+shut off5,Packing:skin ... each shoes lace have 1 battery last 30-80 hoursLight way1.keep light can last 30 hours 2. coruscate fast can last 60 ...