All 6 worked fine right out of the packaging. They come with a pretty standard controller which holds 2 AA batteries (not included) and has a connector to the wire itself. Color is bright and steady. Controller has 3 modes, steady on, slow blink and fast blink. This product is a miracle of modern production methods and logistics. I honestly have no idea how they're making money off these at this price point.
These are so fun as I have used them to make a sign for my antique booth and am gonna use the rest for Halloween costume!
Product Link: http://amzn.to/2Enp3t5