Quark Preon 2 Stealth 2XAAA 120-Lumen Cree XP-G S2 LED Pen Flashlight Black LED: CREE XP-G S2 Seven Output Modes. Max Output: 120 ANSI lumens Material: Type-III Hard-Anodized Aircraft-grade Aluminum. Lens: Optical-grade glass lens with anti-reflective coating on both sides. Battery: Two AAA with Operating Voltage Range: 0.9V-3.0V