LED Bubble Wands with Wrist Straps have 3 light functions. Choose from a super fast flash of color that you have wave in the air to see 3 different LED colors. - You can also sent it to a fast flash of the 3 LED colors or set it on quick transition then flash function.- To activate or change the setting press the red button located below the battery housing. - Height: 7.50 in. , 19.05 cm - Width: 0.62 in. , 1.57 cm. - Strap Length: 6.75 in. , 17.14 cm. - Colors: 1 Blue, 1 Jade, 1 Red - Batteries: Includes 3 AG13 Batteries.The LED light stick's batteries are replaceable.