RECHARGEABLE: Pair with the included Lithium-Ion battery or swap in 4 x AA alkaline batteries BRIGHTEST: 2000 lumens at 300m make this one of COAST's brightest headlamps. LONG-LASTING: 8 hour run-time on High, 15 hour run-time on Medium, and 65 hour run-time on Low. PURE BEAM focusing Optic: Shift between a super wide flood beam or spot mode with transition halo at varying distances and brightness. TWIST FOCUS system: Twist the head of the light to move between a flood and a spot beam.