FOR ANYONE, PLACE ANYWHERE: This bracelet is suitable for people who like running, riding or going for a walk at night, and also for little kids out at night. With this in the dark, runners can be seen by drivers and kids can be easily found by parents. It can also be placed on bikes or anywhere you want. RAIN & SWEAT RESISTANT: This armband is TPU coating on the front and back side in order to improve its rainproof and sweat-proof ability. ADJUSTABLE SIZE: The bracelet wrap around without buttons so that it fits various sized wrists or ankles, both kids and adults. FOUR FLASHING MODES: Fast flash, slow flash, full illumination, and power off. REPLACEABLE BATTERY: Come with an extra battery. It can be used after changing a new battery. It is available with one CR2032 button cell. Product Description Designed to give you high visibility in dusk and night time activities. A djustable Size: The bracelet wrap around without buttons so that it fits various sized wrists or ankles, both kids and adults. Four Flashing Modes: Fast flash, slow flash, full illumination, and power off. Rain & Sweat Resistant: This armband is TPU coating on the front and back side in order to improve its rainproof and sweat-proof ability. Snap Bracelets of 6 Colors: Blue, Green, Yellow, Orange, White, Red. Replaceable Battery: Come with 6 extra battery. Fit for Outdoor Activities at Night: Running, Cycling, Pet Walking, Hiking and Camping, Concerts and Raves, Marathons and so on.