Foursevens Preon 1/ P1 Blue Finish / Cool White LED; 1XAAA; 70 Lumens LED: CREE XP-G Max Output: 70 Out-the-front (OTF) lumens Material: Hard-anodized Aircraft-grade Aluminum Lens: Optical-grade glass lens with anti-reflective coating on both sides Battery: (see voltage range to select acceptable batteries for this light) Operating Voltage Range: 0.9V-3.0V Seven Output Modes: Low, Medium, High, Strobe, SOS, Beacon (Hi), Beacon (Lo)