Great little set of hand warmers!
My hands are almost always cold. I thought these warmers might help. They work great! The warmers come in a charging bin. They were already charged when I opened the package. They heat up instantly. The charge lasts for hours. I used them for multiple hours over several days without needing to recharge them. The bin acts as a recharger, even when it’s not plugged in. I love that feature for portability. This also includes a charging cord, so with a USB plug, you can recharge easily with an outlet; or use a USB car charger. There are three heat levels. The lights on the chargers let you know what level you are using. I use the lowest setting. I like that there are lights on the warmers which indicate the remaining charge. When the warmers are in the charging bin, the lights indicate when they are charging. They are a nice size in my hand, but not too big to slip into my pocket if I need to do something. I even slipped them into my gloves one day. The instructions are clear and they make sense. Great purchase!

Kept my hands warm in 18 degrees
I live in the Chicago area and we can get pretty cold and windy. I dress for the weather but my fingers are always freezing even with heavy duty winter gloves. I walk my dogs everyday and was looking for something to help with the bitter cold days.Went to Holiday Magic at the Brookfield Zoo and tried these out. It was a warmer day, just above freezing, and I had my super warm gloves on but I kept taking them off to take pictures. I’d put the gloves back on, then put my hands into my pockets. I set these hand warmers at the hottest temperature. What I noticed was that if I placed the tips of my fingers around the warmers, they warmed through my gloves and kept the tips of my fingers warm, which helped to keep the rest of my hand warm.Today I went for a hike. It was 18 degrees. Doubled my gloves (with a liner then then a heavier glove.) Turned the hand warmers to high, and rested the tips of my fingers on the warmers. They worked great and kept my hands warm even at such cold temps.There are three heat settings. The lowest can be held with bare hands. The high gets pretty hot and worked well to permeate the layers of thick gloves. I haven’t used the medium setting yet.These hand warmers come with a charging box that I like. It a good storage container so you don’t lose or misplace the hand warmers plus you can charge the box (rather than the individual hand warmers) and while the warmers are in the box, they charge. The area I was hiking was about an hour drive away so I was able to keep the hand warmers in the box, keeping them charged, until I got to the hiking area. I had them turned on “high” for about 3 hours and they stayed hot.So far I’m very happy with them. I’ve had them for 2 months and hoping they last through the winter season.

Stays hot for a long time
I’ve had the round have warmers before, but these are so much more sleek than the others. They’ll even fit into a pair of gloves nicely.There are 3 settings. Most times I only need the first setting if I’m carrying them in my hands (otherwise they might be too hot). If I put them in my pockets, I might go higher.

They are worthless
They don’t not warm at all .My dad used to have one and it keep you hand warm .Don’t buy them.