Adorable Mini LED Glasses have an irresistible charm that everyone will enjoy. To activate your Mini LED Wine Glass with Black Base, press the button underneath to activate the slow color change function. To assemble, simply attach the cup to the base. Dimensions (W x H): 2.2″ x 6.6″ Volume: 5 oz. LED Colors: Rainbow Comes ready to use with 4 replaceable AG10 Batteries.