Features:The voice control mask can be rhythmically beat according to the pitch of the music and the size of the sound. The thickness of the light board is 0.3mm, the flexibility is very strong, the bending property is strong, the power consumption is low, the heat is not heated, and the brightness is uniform. Its design is diverse, stylish and cool, with bright colors. It is safe, easy to wear, small in size and easy to carry. It requires 2 AAA batteries to be used, easy to use (without battery delivery). Specifications:Product Size: Approx. 53.6*24cm/21.1*9.45in Package List:1 * Control Box 1 * MaskNot include the battery Note:Please allow 0-2cm/mm error due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.