This very bright headlamp uses three AAA batteries and boasts 200 lumens of brightness with a beam distance of 90m. It features a boost mode, providing 335 lumens and a 120m beam distance while the button is held down. It uses a high-intensity white LED (1) effective for walking with a wide viewing angle, and warm white LEDs (2) that are gentle on the eyes. Three AAA alkaline batteries are included. It is also compatible with Ni-MH rechargeable batteries and lithium batteries. ・I kept it in a pouch in my backpack for emergencies. Thank you for viewing.