Black and gray LED casing. Black band with red and white trim. 2 1/8" overall. 3 mode switch: 1 maxbright LED on high with visibility up to 30 meters, 1 maxbright LED on low with visibility up to 15 meters and 1 ultrabright red LED with visibility up to 6 meters. 50 lumens. 
Water resistant. 
Runtime: up to 146 hours. 
Features single arm bracket. Includes black elastic head strap with logo. 
Uses two AA batteries (included). Lithium compatible. 
Weighs: 64 g