The Tungsten USB adds a micro USB charge port, internal charge circuit and Lithium-Ion power cell to the distinctive Tungsten design. Premium Tungsten features remain. A ringed, three flute grip is machined into a matte black Type III hardcoat anodized aerospace aluminum body. The four cut switch rotates to an Intermittent · Locked · Constant position. The detachable pocket clip may be positioned lens up or lens down. All connectors and springs on the Tungsten USB are gold plated. The electronic circuit board drives a Cree XPG2 R5 LED to 350 lumens as measured against the ANSI FL-1 Standard.

Loosening the head of the Tungsten reveals the micro USB charge port. Attach the retractable charging cable to the supplied car charger, wall charger or to a computer USB port. Even a micro USB cell phone charger can be used to recharge the Tungsten USB. The battery indicator of the Tungsten blinks red when charging. It turns solid green when fully charged. The car charger and wall charger have a blue LED indicator to confirm that the power source is active. The chargers and cord are encased in a zippered ballistic carrier.

· 350 Lumens (ANSI Standard) · 2 Hour Run Time · Micro USB Charge Port · Charge Indicator · Type III Hardcoat Anodizing · Reversible Pocket Clip · Intermittent · Locked · Constant Switch · 5.75" Long · 18650 & Link Case · Zippered Travel Case