Come and see our amazing products. 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 alert others and Protect yourself. This lithium battery CR2032 battery is installed and replaceable. You do not have to worry about the battery being consumed, we will install insulating sheets for each product. Customize your company name and logo to improve safety. 9 7/8"Lx1 9/16"W Pls confirm further with us if any query about packing info, inventory status and time schedule.