Mighty Bright Carabiner Light 2-Pack Silver & Blue Bright white, energy-efficient LED LED lasts 100,000 hoursCarabiner clip Convenient constant-on switchBeam visible up to one mile Strong, lightweight polycarbonateFits belt loop, pocket24 hours of battery life2 lithium batteries (included)2.5" x 0.25" x 1.5" (Length x Height x Width)