The Redline® FLEX utilizes Flex-Power™ Technology, which allows the light to be powered by a single AA battery or a lithium-ion 14500 rechargeable battery (included). The FLEX features 6x adjustable zoom, a dual-direction clip and a powerful magnetic base for convenient hands-free lighting. Convex lens. 6x adjustable zoom. Anodized aircraft-grade aluminum; water and impact-resistant. Dual-direction steel clip. Flex-Power™ Technology. Battery charging indicator. Powerful magnetic base. Micro USB to USB charging cable included. 4 LIGHT MODES – 14500 Rechargeable Battery (included). High (250 lumens) – 2.5 hours / 160 meters. Low (80 lumens) – 5.5 hours / 89 meters. Strobe (250 lumens) – 2 hours / 160 meters. Turbo (450 lumens) – 40 seconds / 237 meters.