Review on Windy City Novelties LED Light Up Christmas Bulb Necklace Party Favors for Ugly Xmas Party (1 Pack) - Original and Fun! by Tabu Little

Like some here, my 1 pack didn't work properly out of the box. It only stays on when I hold down the button. I noticed that the battery compartment wasn't completely flush, so I opened it up and reattached it. I made sure the batteries, button and wire ends are in place. After screwing in two screws, the necklace works as advertised. The electronics inside are not complicated. It's basically as heavy as LED flashlights. If something isn't working properly, there's a good chance something is in the wrong place. This product was probably newly made, so I can easily imagine someone not giving each necklace their full attention like an artisan making one piece a day or so. I'm just glad this simple product works after re-pinning everything. My mother in law is happy!