The EINSTEIN 750 FLEX is a compact, 750 Lumen, headlamp that offers adjustable, handsfree lighting with Flex-Power Technology for rechargeable or battery-powered operation. With 2-light sources and 2-color options, the EINSTEIN 750 FLEX provides 5 unique light modes for a variety of tasks.. Battery Life (hours): 25 hr. Battery Type: 18650. Bulb Type: LED. Casing material: Plastic. Color: Gray. Flashlight Features: Variable Light Control. Flashlight type: Headlamp. Hardware Color Family: Gray. Included: Battery. Light Mode: Red,Standard. Lumens: 750. Number of Batteries Required: 1. Package Quantity: 2. Power Source: Rechargeable. Product Weight (lb.): 0.45 lb. Protective Features: Impact Resistant,Water Resistant. Returnable: 90-Day. Safety & Security Product Type: Flashlights & Accessories. Product Depth (in.): 2.5 in. Product Height (in.): 4 in. Product Width (in.): 5.2 in. Lumens: 750. Power Source: Rechargeable. Light Mode: Red. Flashlight Features: Variable Light Control. Casing material: Plastic. Protective Features: Water Resistant. Bulb Type: LED. Protective Features: Impact Resistant