Measures 2 1/2" overall. Gunmetal gray and black composition housing with single arm bracket. Two white Maxbright LEDs and one ultrabright red LED. 90 lumens. Five modes: Dual Beam - runtime: up to 75h, beam distance: up to 58m. 

Spot - runtime: up to 100h, beam distance: up to 52m. 
High Flood - runtime: up to 100h, beam distance: up to 32m. 
Low Flood - runtime: up to 150h, beam distance: up to 24m. 
Red - runtime: up to 200h, beam distance - up to 6m. 

Power dial for direct access to any mode. 
Waterproof: up to IPX4. 
Uses three AAA batteries (included). 
Black and gray nylon elastic adjustable headband