Ultrafire&reg; Wf-502B Cree Q5 Single - Mode 300 Lumen Yellow Light Hunting LED Flashlight CREE Q5 with 300+ Lumen output with Integrated Belt Clip 1 Modes: High, Low and Strobe Aluminum alloy casing with o-rings for water resistant design.as compared to 501B it has a belt clip It could still be used during the day for signaling, reading maps, and other tasks Power by: 1 x 18650 Rechargeable Li-Ion Battery (not included)