Our bracelet is suitable for people who like running, riding or going for a walk, concert and a party 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.Bracelet flashing is control by Voice/ Activated/ Sound with fun flashing light, the Voice/ Activated/ Sound is more strong, the Led is more bright, the more they flash-both in timing and in strength -- creates the perfect atmosphere for nightclub, disco, bar, party, music concert, and other night outdoor sports cheering