Description Quantity: 1 piece color: blue Size: 20-40cm High visibility and reflectivity. stay cool and safety for night running. cycling. jogging. walking dog. camping and other outdoor activities and sports. attached to wrist. ankle. arm and leg. or tied on bike. helmet. schoolbag. backpack and so on. Rain and sweat resistant PVC with elastic knitted band. eco-friendly and comfortable to wear. Reflective material makes the band much brighter. 3 Models: flashing. static and off. Powered by 2 pieces CR2032 batteries (in equipment). Battery life: 60-80 hours. When runs out. can be replaced by new ones. Package included: 1 * Tabiger Elastic Armbands with LED flashing light (equipped with batteries).