Insert the top of each lace into the 2 holes of the control box,switch Push the white button in turn to control the lights: on/flash/strobe/offFeature:1. LED light source high light transmission optical fiber, certified by CE ROHS2. Withstand tension: 3KG3. Battery: Each shoelace use a CR2032 coin cell battery. Under the long bright circumstances continuous discharge 30 hours, flashing or intermittent discharge is 60-80 hours, normal use 2-3 months, you can replace the battery yourself.4. Instructions: After lacing the shoelaces, shoelaces ends through the hole lock and insert into lighting hole, then rotate to LOCK. Press the middle button, press once long bright, twice quick flash , three times to slow flash, four times that close.5. Suitable for outdoor sports, night running, a large festive party, concert, cheer and other activities.6. WaterproofPackage Included:1*Pair of shoelaces