Features: brand new and high quality Drive with 2x AAA Batteries Installed to Start the Light Up Mode.(Not Include) High quality: the sound-active LED mask is made of high-quality, safe Plastic and a non-heating EL panel. Works with a cold light source. EL wire does not make the mask hot after long for time wearing, so it does not harm your face. Just press the switch button, the light flashes with your voice or music instantly. One Size Fits All. Adjust the Combination of Buckle and Straps on the Driver to Fit your Face. Perfect for Riding, Skating at Night, and Many Sports, Halloween, Costume Parties, Masquerades, Mardi Gras, Rave Festivals, Carnivals, Gifts, and more. Specifications: Material: Plastic Color: 1/2/3/4/5 Size:Approx.58x28cm/22.83x9.44inch Brightness: 70-120cd/m2 Thickness: 0.2-0.5mm Power Consumption: 3-10mw/cm2 Current: 0.1ma/cm2 Service Life: 3000h Package Includes: 1 Piece Mask note: Please allow 0-1cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Powered by 2x AAA Batteries.(Not Include)