Fenix Flashlights TK09 450-Lumen Flashlight, Black Features three modes: High-450 Lumens (2hrs), Medium-130 Lumens (7hrs), and Low-15 Lumens (65hrs) Tactical tail switch with momentary-on function Uses one 18650 rechargeable Li-ion battery or two 3V CR123A Lithium batteries-No batteries included IPX-8 Waterproof, 2 meters for 30 minutes Supported by limited lifetime guarantee from Fenix Lighting, US