. Press once for bright light. . Press twice for medium light. . Press three times for low light. . Press four times to make use of LED can solves part of energy crisis what we all face. With less of LED power and produce less of heat . You will suddenly find that LED wildly use in home or the buildinghave no harmful material use of LED.Led has long life span,you will get away from to handle an incandescent lamp to steep about 50 and 5 mercuries pollution, finally rescue our environments.Packing:paper card and blister card