ELECTROLUMINESCENT FLASHING BATTERY OPERATED YIN-YANG Electroluminescent Flasher Fun Whole lot of flashing fun from Lite-Upzz". The flat 2-1/2" dia yin-yang sign plugs into an aluminum base, 3" dia x 1-1/8" tall, and flashes in black and white. Has an on/off switch and a mode button that lets you cycle through (8) different light patterns.