Product description Size: armband length: 32CM width 2.5CM Color: blue, green, red Material: nylon webbing + LED electronics Package content: 2pcsLED light-emitting armband 1.LIGHT POWER ENOUGH The strong luminosity makes you more visible in twilight and rainy weather. Best protection in the dark 2.RECHARGEABLE TAPES The battery does not need to be replaced, the tapes can be easily charged with the included charger 3.3 LIGHTING MODES It has 3 modes, slow flashing, fast flashing and steady light. This can be easily set using the button 4.UNIVERSAL APPLICABLE Suitable for jogging, running, cycling, night hiking, mountaineering, dog walking. More security on the way 5.ADJUSTABLE SIZE Adjustable strap (28-32cm) is ideal for adults and children. The Velcro fasteners hold tight and do not slip down