Yanseller 6pcs Random Color Fluorescence Stick & Electronic LED Flash Bracelet & Light-emitting Bracelet External diameter8.5cm(3.35") Internal diameters6.5cm(2.56") Replace batteries ( 3*AG3 ), lasts over 10 hours Whorl Color :Violet ,Green ,Pink Bring you an unique night Multicolor Flashing Barette -Rainbow Colors (Alternating Multicolors) , Rave Party Hand Accessories