The ProTac HL Series now a hands-free, USB reversible lighting solution ! . When your task both hands and a glittery floodlit with a nationwide, flood beam, reach for the ProTac HL USB headlamp. Charge on-the-go using almost any USB source, and since it accepts dual battery sources as a backup, you 'll always power when you need it. reversible Lithium Ion battery included and reciprocal crimson and Green lenses also .