Light up Shutter Glasses by Glowseen -Sound Reactive-USB Rechargeable Rave Glasses--White SOUND REACTIVEUSB Rechargeable,Great for Music Festivals, Concerts, Raves, Costume Parties, KTV, Bars,Halloween,Christmas,Indoor&outdoor WITH USB RECHARGEABLE CABLELED shutter shades working time about 8Hours under full charged in a high-energy noisy environment , no need to waste money buying expensive button cell batteries. High cost performance & environment friendly 2 COLOR OPTIONALBlack&White color available, top notch quality. kit will including 1XLED glasses,1Xmicro USB cable ,1Xmanual at English,1Xwarranty card WEAR ITAs seen on the Today Show, become a eye catcher. Prefect for the night club, raves, music festivals, concert and other event THE CUSTOMER IS SUPREMECustomer support response timely. If not satisfied, please contact seller before you leave a negative feedback or review. Free exchange, return and refund