A dream come true! ALL ONE UNIT, a Balloon, Light Source, One Way Valve that can stay on for 8+ hrs. These balloons are High Quality 12'' Multicolered Colored Latex Balloon, and pre-attached it to a one way valve. Inside the valve is a real High Powered L.E.D. that has single mode i.e Constant On. The Flashing LED Balloons are available in Multicolored.