APEX™ Headlamps have three settings that give you lighting options. 3W Maxbright LED with calibrated optics provides intense, smooth, bright light—even at long range. Four Ultrabright LEDs for close range tasks and wide angle. Safety flash mode has four light levels.Impact-resistant housing. Regulated LEDs deliver constant light. Submersible to 1m. Battery power indicator. Strap buckle doubles as tool to open battery pack. Operate on 4 AA Batteries (included). Compatible with alkaline, lithium or rechargeable batteries.