Features: 1) 5PCS LED, 30 hours burn time 3) Weight:Weighs only 1.24 ounces with batteries 4) 3 ultra bright white LED bulb . When you keep on push the button,3 bulbs light , then push the button, 3bulbs  flash. Then all bulbs turned off 5) Service life: 10,000 hours 6) Battery: CR2032