I love how easy they are to use, no plugs. Just remove the plastic tab and your good to go. Very bright! Great for my DIY floral jars. The wire is approximately 7 ft long.Haven’t tried them all but the first one out of box had no switch on it.Got this for an even i had I decided not to open them until the even just to find out they all came in tuned on, that means that by the time i got them the batteries were dead. Only one turned on out of 16 not worth buyingThese are great lights! Disappointed that 2 of the light strings won't work.totally fine for what they are BUT:You have to pull out the plastic tabs (that prevent battery power ebb) before you can turn these on. It's a little bit of a hassle for something that is clearly not meant to last forever.Also, you cant really replace the batteries -- I mean you can, but when you open the case up, the contact copper on one side is BARELY in place, using glue. It will be really hard to keep that in the right spot once you open this up and swap out batteries. The batteries this thing needs are also almost as expensive as the lights!2 of our 16 didnt work at all.And, there are 10 foot sets, as opposed to 7, with 30 lights, instead of 20, available for about 5 bucks more.You do get a super cute mini screwdriver though -- your kids will love integrating that into their LOL, Barbie or DC superhero girls adventures.LOVE these mini lights. Got these to make little sparkly jars to give my employees at the holidays. Each comes with batteries.