The Mastervision #MV1001 is one of our best lights for the price. This clip on head light has 5 bright LED lights that is powered by two lithium coin cell batteries. The entire light only weighs 1.24 ounces and is both water resistant and rugged. The head lamp attaches to all hard hats and also other types of ball caps. Can be used for professional use, recreation, mechanics, hobbyist and anyone needed hands free bright light. The MV1001 also has several different light patterns to choose. For longer battery life the unit can use only the front LED light. The item can also have the middle 3 lights lit, or have all 5 lights lit. The light also offers an option to blink all 5 lights if desired.