Premium CREE XM-L (U2) LED; Maximum output of 860 lumens; High efficiency circuit enables maximum runtime of up to 24 hours; IPX8 waterproof grating (submersible up to 2 meters); Two rapid switching modes suit various user requirements; User-defined mode allows for customized brightness levels and a multitude of functions; Intelligent memory functions; Anti-roll design; Reverse polarity protection; Broad voltage drive circuit, compatible with rechargeable and non-rechargeable Li-ion batteries; HA III Military grade hard anodized; Purpose-made rhombic knurling for better grip; IPX8 waterproof grating (submersible up to 2 meters)