APALS&reg; Outdoor-Adventure-Signal Safety Pack APALS Can be seen up to 1/2 mile Runtime 200+ hours. Waterproof, Dustproof & Shockproof. Modes: Fast Strobe / Slow Strobe /Steady On / Off Heavy Duty 3M Adhesive Back & Easy-Pull Tab Pack of 10 fits easily in a BDU pocket or kit and weighs around 1.6 oz