AcTopp LED Shoelaces High Visibility Soft Nylon Light Up Shoelace with 4 Modes Rainbow Colors for Night Running, Biking, Disco, Party, Cosplay, Hip-hop Dance Safety and Cool (Yellow(yellow light)) Pull out rhe article,press the switch at the top,you can open the LED shoelaces. Open the top of the controller. Press the switch at the top every time,long bright,flash,slow flash,shut down. You can change two button batteries. Install 1x CR2032 button cell battery into each control box Lace up your shoes with these 2 shoelaces Insert the top of each lace into the 2 holes of the control box, switch the lock to &#034;lock&#034; mode Push the white button in turn to control the lights: on/flash/strobe/off The batteries can last for about 30 hours when the light stays on; last for 60-80 hours in &#034;blink&#034; mode