... it's visible at 400 meter distance, webbing colors and Led colors are optional, quick flashing and slow flashing mixed makes ... easy to change the battery.♥ Product Name: Party nolvety Flashing LED Shoelace ♥ Item No.: YZG-BI Series ♥ Material available: nylon, ... color available: Red, Green, Yellow, Blue, Black, Pink,Orange etc. ♥ Led color available: Red, Green, Yellow, Blue, Black, Pink,Orange etc ...