This slap bracelet contains a CR2032 button battery, which can continue to emit light for a long time. Press the switch, there are three modes: constant light, slow flash and fast flash. It is often used for concert cheering and night running activities. It can get others to find you in tihe crowd. This lithium battery CR2032 battery is installed and replaceable. Customize your company name and logo to improve safety. 9 7/8"L x 1 9/16"W
