OLIGHT M20SX Javelot M20-X 820 Lumen LED Flashlight, Black Three brightness levels from 25 to 820 lumens, plus a strobe mode Customized CREE LED with a smooth reflector creates a tightly-focused beam to maximize throw reaching out to 370M (1214 ft) Multi-function click tail switch with momentary activation and on/off, along with quick access directly to the brightest level and the blinding strobe mode Side switch to select modes with memory function to remember the last power setting used Aircraft-grade aluminum body with anti-scratch type III hard anodizing, pocket clip, and crenelated stainless steel striking bezel.Reverse polarity protection to prevent improper battery installation and thermal management to avoid overheating 1.5m 1m