I have these on my work truck whenever I am parked on the street or have part of my truck sticking out from a drive way. They are very easy to use, charge once you get the dust cover off, and to place with various mounting options. The remote control works great too once all four strobes are paired. The only issue I ran into were loosing the dust covers when charging them due to how small they are and that they don't attach to anything incase you have to charge these on the go. The other issue that I've had is the magnet on one strobe falls out a lot, like it's not glued or adhered onto the back of the strobe at all. I use this method the most due to the metal rack on my work truck. Using some EB 600 glue does the trick. These strobes are bight, together. If you spread them too far apart then you're loosing some of the brightness in the daylight. Overall I am very happy with these lights for safety on the work sites, they're so easy to place on my truck and have them working asap with the remote control. I highly recommend these!

The YXNXLIGHT 4PCS Wireless LED Strobe Light with Remote Control can be used for business or fun.First things first - all lights arrived with a decent amount of charge, however they recommend you charge them first thing anyway, which I did. Immediately after disconnecting from the USB power supply they turn on. I'm not sure if that's as good thing or not honestly. It could be annoying - if you're just charging them before going someplace where you're anticipating needing them then you have to use the remote - where did I put that again, oh here it is - turn off 1, turn off 2, turn off 3, turn off 4. You get the idea. But it could be helpful, you're charging and the power goes out - these things immediately light up.After the charging is taken care of then comes the fun part, using them. As I found out with the help of my two granddaughters they can be quite fun. Since they're magnetic they placed them strategically around the room, turned out the overhead light, then turned each of these on. Each with a different flash pattern and color pattern. It was......interesting, and I sometimes felt like I was going to have an epileptic fit at times, but overall it was a good time for me, and a fabulous time for them. LOL.I could see these being VERY useful attached and flashing to your vehicle as you sit by the side of the road changing a tire, or waiting for a tow truck, or police. I know nobody wants to think about it, but it's always best to be prepared, and I think these nifty lights would help with that task. Or perhaps for Halloween, make it a part of your childs costume or simply attach it to their clothing, it's magnetic so just get a small piece of metal and use it as a back for the magnet inside their shirt. Viola' - instant tracking/visibility. Just a few of the many many uses for these handy little lights.Like I said, they take a USB-C charging cord and a standard USB computer port or a standard phone charging block - which isn't included, the power block I mean. Four short USB-C cords are provided. As a test I tried to run one of them down completely, took a long while which is a good thing, but it only took about a half hour to fully charge it. The unit lights up, dimly, while charging and goes out when charging is completed. They also have "ears" on the sides and small elastic loops are included to allow you to connect them to small poles and the like. Alternatively small velcro squares are also included, but they'd have to be single use as the velcro would have to be removed in order to charge the unit.But again, overall, very handy and useful lights with a wide variety of uses. I couldn't really find any negatives to them, which is a good thing. Would I order them again should the need arise? Definitely, as I said, very handy to have on hand. Would I recommend them to others? Absolutely, as I feel they're a must have for an emergency kit for your vehicle, among many other uses.A+++++