Streamlight ProTac® 2.0 Headlamp – Black SLI89001Streamlight ProTac 2. 0 Headlamp Black SLI89001 The ProTac 2. 0 Headlamp delivers high output performance in a compact, rechargeable design powered by the SL B50 battery pack, which charges inside or outside the light via USB C. Features & Benefits Uses (1) Streamlight SL B50 protected Li Ion USB rechargeable battery pack (included) TEN TAP Programming with three user selectable programs: 1) High Medium Low 2) High Only 3) Low High High: 2,000 lumens;