A 1000-lumen maximum output, a sturdy and lightweight aluminum body, and power supply options distinguish the Streamlight ProTac HL Rechargeable Headlamp. Its battery pack recharges inside the light via micro-USB, but the light can also run on one user-supplied 18650 battery. A push-button switch is used to cycle through high, medium, and low brightness levels, and you can select three programs that put the light levels you use most often at your fingertipshigh/medium/low, high only, or low/medium/high. Red and green filters are provided for light that won't disrupt night-acclimated vision, and a diffuser filter creates a flood beam for close-up tasks. If you need the spot beam back, simple stow the diffuser filter on the end cap of the light. The anodized-aluminum housing has an IPX4 water-resistance rating and is impact resistant to 6.6'. Consistent performance is assured by digital output regulation circuitry, which maintains the brightness level throughout the charge. This item comes in clamshell packaging.