Features:Multiple light effects: fast flash, slow flash, permanent brightGreat for parties and concerts.Suitable for any type of shoe including running shoes, boots and skates.Waterproof, can be used on rainy days.Specifications:Power: 2 cr2032 battery for each control box (not included)Lace material: NylonLength: 120cm10 LEDsColour: multicoloredModes: fast flash, slow flash, bright permanentWaterproof and washableThe package includes:A pair of light up laces.Note: the battery case is not waterproof.Lighting time:Continuous light: 30 hoursFlashing or flashing light: 60-80 hoursNormal use: 2-3 months