<div id="video-block-R2R1AF5LSDGL3" class="a-section a-spacing-small a-spacing-top-mini video-block"></div><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/81VS6o16YkS.mp4" class="video-url"><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/91rPABB5WkS.png" class="video-slate-img-url">&nbsp;Wore these to EDC (a huge rave), and loved them so much! Definitely worth the price. I was surprised that I didn't see anyone else wearing them! They flashed different colors and lasted the whole night. They were maybe only slightly less bright 8 hours later. I did, however, buy more batteries bc of that fact, since we went for 3 days. It would have been cheaper just to buy more pairs of these earrings! So if you plan to use multiple times for long periods,maybe just buy multiple pairs  Also, I read that some people had some issues figuring out how to turn them on and off. When you put the backings on firmly it turns them on. Pull the backing off only every so slightly and they turn off! Push back on to turn on. Didnt notice any kind of different flashing patterns, just the one. It seemed to vary from slow flash and fast flash.