The HL Series now has a hands-free, USB rechargeable lighting solution! when your task requires both hands and a bright light with a wide, flood beam, reach for the ProTac HL USB headlamp. Charge on-the-go using almost any USB source with a rating of at least 5W/1000mA, and since it accepts multiple battery sources as a backup, you'll always have power when you need it. Rechargeable Lithium Ion battery included and interchangeable red and Green lenses also included