... 4,refreshing color 5,pass the CE flashing el shoelace with CR2032 button batterythe specification ... flashing,slowily or lighten up4 the size 80cm in length for one piece, and the diameter is 2.8cm5 Battery ... you could choosefrom them2 the quickly flashing ,slowly flashing or light on is controlled by the ... Battery life 3V and 230mAh battery can last for 60 hours for long lighting and 80 hours for flashing ...