5 1/4â€³ overall. Black high-impact, water resistant polymer construction with black TPR soft touch over-mold. Regulated circuit for maximum output. CREE LED. Anti-roll design. Three modes: High â€“ up to 251 lumen output, visible to 127m, with 3 hour, 30 minute runtime; Low â€“ up to 13 lumen output, visible to 30m, with 59 hour runtime; and Strobe â€“ up to 251 lumen output, visible to 127m, with 6 hour runtime. Uses two CR123 batteries (included). Hang packaged.