LED Glasses, Light up Glasses, USB Rechargeable Flashing Glasses Music Sound Activated, Glow Shutter Shaded Eyeglasses for Costume Parties, Carnival, Christmas - Black ATTRACTIVE ATTENTION: Music & Sound-Activated, RGB LED lights flashing with the volume, making you a party super star. Perfect for Concerts, Clubs, Rave Festivals, Bars, Electric glow run, LED parties, Halloween, Costume Parties, Mardi Gras, Carnivals, Gifts ,Birthdays, Christmas, and other festivals. USB RECHARGEABLE: USB chargeable for recycle using (Micro USB charging cable included), no need to replace batteries, more environmentally friendly and economically. PORTABLE: No wires, just like ordinary sunglasses, avoid the redundant electrical wire. No need to replace batteries for recycle using, eco-friendly and economically. Just use micro USB cable to charge it. Easy to carry and wear for kids and adults. SWITCHABLE: One switch control the light on/off, the other one controls the sound volume reactive technology to automatically calibrate. Whether is heavy metal music or lyrical music, it's perfect for lighting effects. BUYING WITH CONFIDENCE: One year replacement for defective units, 30 days no-hassle refund & replacement, Glovion customer service team will provide you friendly and proactive customer service with no-hassle lifetime guarantee until you are 100% satisfied, buying with confidence!