Product name: Colorful luminous glasses Material: Acrylic full frame+electronic components, etc Power supply: 2 button batteries (not included) Color: press the switch to change the next color Size: about 170 * 170 * 45mm/6.69 * 6.69 * 1.77 Battery capacity: 210mAh (replaceable) Time: about 60min Switch control: press the switch to control and long press to close Light mode: colorful constant light/breathing/explosive flash/flowing water/combination Applicable occasions: concerts, bars, KTV, singing and dancing and other entertainment venues Applicable population: children and adults over 12 years old are recommended Note: This product is low voltage output, please feel free to use it!