Fashion&cool LED Slap Band, USB Rechargeable Light Up Sport Armband, Glow in The Dark Adjustable Bracelets for Men&Women, Night Safety Lights for Running, Jogging Cycling, Hiking ULTRA HIGH VISIBILITYPowered with USB rechargeable battery, this LED slap band provides 360 degree ultra-high visibility in dusk and nighttime activities,The brightness is much higher than the glow in the dark glow sticks. That means greater safety for you, your children or your pet from negligent and distracted drivers ONE SIZE FITS ALLVelcro Closure Adjustable size 11.02 to 13.78 inches, it fits on both adult and children, men and women, by simply slap wrap it to different position, such as wrist, ankle, and arm. If you want to use it around the biceps, please check the dimension to see if it can fit on USB Rechargeable  No battery request, flashing up to 3 hours and can be fully charged in half an hour.Three Flashing Mode: fast flash, slow flash, and full illumination LIGHTWEIGHT, SOFT, FLEXIBLE EXTREMELY EASY TO WEAR Designed with comfort in mind. Top material is super thin high strength nylon material and bottom layer with Lycra fabric to make it soft to prevent fatigue and discomfort for wearers of all ages. Comfortable On Both Children And Adults. VERSATILE APPLICATIONSThis glow bracelet has versatile application, such as but no limited to: runners, cyclists, campers, night walkers, auto safety, combine with safety vest, child safety, runner gear, longboard players. Do you still worry your safety when you running/walking/cycling in the  dark at night? What to do if you feel dangerous when you are on the road? Do you want to be Party King or Queen? Provide one perfect security warning effect for your walking, riding, running, mounting and other outdoor sports at night Waterproof and scratchproof, very simple and easy to wear on arm, ankle, backpack, and bicycle. Multiple used for cyclist, runner, kids, dogs, cats etc. <span class="a-text-bold">Materials:</span> Nylon fabric+ TPU light-guiding tube. <span class="a-text-bold">Available Color:</span> blue, green,pink,orange <span class="a-text-bold">Powered by:</span> rechargeable battery Flashing up to 3 hours and can be fully charged in half an hour. <span class="a-text-bold">Three Flashing Mode:</span> Fast Flashing, slow flashing, and steady glowing Velcro Closure Adjustable size 11.02 to 13.78 in It fits on both adult and children, men and women, by simply slap wrap it to different position <span class="a-text-bold">Power Supply: </span>2xCR2032 Removable Battery <span class="a-text-bold">Available Color: </span>Green/Blue <span class="a-text-bold">TWO MODES: </span>One press for a <u>solid light</u>, second press for a <u>flashing light</u>, third press to turn it off <span class="a-text-bold">Bracelet Material :</span>ABS+ Sicilone 2 pcs led armband 2*Cr2032 button battery Continue burn time :72 hours Flashing burn time: 96 hours Very convenient, easy with a coin battery only Min Arm Girth: 26cm/10.14in Max Arm Girth: 58cm/22.6in