product specification S code width 2.5 cm , the shortest 35 cm, the longest 43 cm , scale range 8 cm. material qualitative : high-density printing ribbon + LED super bright light flat fiber (new material) + light soft plastic box (high quality soft glue) affixed cloth + high quality Japanese plastic buckle+button batteries. battery: button batteries (long light time, enhanced version 2032) battery available for 70 hours, normal in 2-3 months; Convenient and quick shockproof, waterproof, replaceable , supermarkets and convenience stores are available light-emitting way : internal contact switch, you can set the flash quickflashing, slowflashing, keep lighting, close, four light way packing : single OPP pack