Reflective LED armband is made of reflective vinyl material with LEDs inside, can have different designs and sizes. LED lights reflective armband,LED arm band,snap wristbands . LED arm band 3M brand, Velcro fasten. Excellent quality Size: 3X42cm 4 high light LEDs Instruction: Lamps activated by pressing the ON/OFF push button. Press once = flashes Press twice = steady light Long-life batteries, lithium battery 3V Cr2032 Using the elastic and hook and loop tape, the reflective strip can be adjusted to fit all sizes of arm and leg. Do not use reflective strip in heavy rain; strip not washable – damp wipe only Keep product out of reach of reach of children – danger of strangulation Please do not apply this product directly to the skin! Please only use the reflective strip in temperatures of between +50° and -20℃ The reflective strips should be stored in a cool, dry place, free from dust, well away from sources of heat and out of direct sunlight Please note: This product increases visibility in traffic and offers additional protection, especially in dim conditions – extreme care and attention is still necessary even when using this product!