Adorable Mini LED Glasses have an irresistible charm that everyone will enjoy. To activate your Mini LED Champagne Glass with Black Base, press the button underneath to activate the slow color change function. To assemble, simply attach the cup to the base.LED Colors Rainbow Comes ready to use with 4 replaceable AG10 Batteries. Features Blinkee Fun Keep Blinking Specifications Base Color: Black LED Color: Rainbow Volume: 5 oz. Dimensions: 2.2 x 6.6 in.