The ProTac HL USB is incredibly bright and features multiple power source capability; Streamlight 18650 rechargeable lithium ion battery, two CR123A batteries or lithium ion batteries. The Ten-Tap programming lets you choose the selection of modes of operation-strobe, high, medium and low. It is constructed from aluminum with an anodized finish, glass lens, push-button tail switch, anti-roll facecap and is gasket sealed. Included is a removable pocket clip, holster and 120V AC/12V DC USB charging cords.