1800 Lumen Ultrafire XML C8-t6 5-mode Cree LED Flashlight+ 4x 18650 + Charger CREE XML T6 with 1800 Lumen output with Integrated Belt Clip 5 Modes: High, Low and Strobe, SOS Aluminum alloy casing with o-rings for water resistant design.as compared to 502B it has a belt clip 4X 5000MA 18650 battery + Charger Rugged, anodized, CREE LED designed to last 100,000 hours