Fibre Flare Micro-flare Duo Combo White & Red Total Length: 5.6 inches Power Source: 4 x CR2032 (Lithium)  Included Battery Life: 55+ Hrs (Strobe), 24+ Hrs (Constant) Visibility: 650 ft + (Omni-Directional i.e.: Visible in all directions) 10mm OD Flexible Fibre Optic Core nterchangeable Silicone Ladder Slings (x 2pcs included) fastens to objects .4 in  2.3 in