These lights were a great find and perfect for a dance party. The different modes are all really pretty and even though they don’t sync with music, it looks like the lights are dancing along with the beat. I have not yet tried the timer function so I cannot comment on that. The battery life is amazing on this product. I had originally thought with all 4 light spheres connected to the same battery, it wouldn’t last very long, but I was mistaken. We have turned them on every night, in different modes and the battery lasted for almost an entire month! They are also very easy to charge as the power bank comes right off to plug into the charger. Great buy!I do wish they had a plug for the wall so I didn't have to charge them but they work great and the battery lasts quite some time.The description states it is Waterproof and as far as it working it is, but the wires that the lights are on aren't. After getting rained on once they turned from silver to either brass colored or rust. I'm sure they are junk now, they sure look like it.The battery life is too short (about 18 hrs), and recharging takes long time > 8 hrs. The remote control work only for short distance, about few feet.It isn't as bright as I expected but it makes a nice showing.I like these lights, once you get them straightened out they are cool looking but the rechargable battery/controller combo only lasts for 5 hours when they are on "steady on" and since the controller(not remote control) and battery are all in one you cannot plug them in to an AC port because you have to remove the controller to do that and they don't work without it so you will have to recharge them a couple times a day to have them on. And it takes several hours to recharge the pack. I kinda wanted them to be a permanent fixture but that is going to get old really quick.The lights look really nice outside by the door. The remote control did not work at all. I still love the lights and the fact that I can recharge them during the day.Meets my expectations