Impact resistant. Lanyard. Tailcap switch. Water resistant. CREE XP-G2 S3 LED. Three brightness levels and one special mode. High: 135 Lumens for 1h 30m l Medium: 40 Lumens for 6h l Low: 10 Lumens for 23h. Reverse polarity protection. Magnetic tail cap with tail stand capability. 360 degree flood illumination. Requires one AA battery (not included). Hang packaged.