Product descriptionSize: armband length: 32CM width 2.5CMColor: blue, green, redMaterial: nylon webbing + LED electronicsPackage content: 2pcsLED light-emitting armband1.LIGHT POWER ENOUGH The strong luminosity makes you more visible in twilight and rainy weather. Best protection in the dark2.RECHARGEABLE TAPES The battery does not need to be replaced, the tapes can be easily charged with the included charger3.3 LIGHTING MODES It has 3 modes, slow flashing, fast flashing and steady light. This can be easily set using the button4.UNIVERSAL APPLICABLE Suitable for jogging, running, cycling, night hiking, mountaineering, dog walking. More security on the way5.ADJUSTABLE SIZE Adjustable strap (28-32cm) is ideal for adults and children. The Velcro fasteners hold tight and do not slip down