UV led headlamp UV ultra-violet light 4 modes of operation: 1 LED mode, 7 LED mode, 19 LED mode & 19 LED Flashing mode UV led headlamp1). ... violet light2).4 modes of operation:1 led mode,7 led mode, 19 led mode&19 led flashing mode3).Water resistant4).Adjustable strap5). ... maintenance8).Powered by 3*AAA batteries(not included)9).Headlamp size:6.5*7.2*5.5cm10).strap length:40cm(Max.) UV led headlamp