... ,durable 3.Custom-made Led shoelace/flashing shoelaces Specification: Flashing Mode-Static light, fast flashing,slow flashingProduct packing:-1pair/blister card, ... for each piecesBattery life- 30 hours for static lighting ,flashing for 60-80 hours ,can last for 2-3 ... rohs approved ,water proofApplication- Skating ,outdoor sports ,evnening running, big events ,concert ,promotion ,sports cheering