Slightly larger than a quarter and weighing 7 grams the PULSAR provides instant illumination for any situation. This compact ultra bright L.E.D. burns with unbelievable intensity making it the perfect choice for key chains backpacks book bags zippers and emergency situations. Like all Princeton Tec products the PULSAR is made in the USA and backed by a lifetime warranty. Lamp: High powered white L.E.D. Burn Time: 12-14 hrs Weight: 7 grams w/batteries Beam Angle: 20 degrees Batteries: 2 Lithium coin cells (included)