The information says these last up to three hours but I find they last much longer than that. The first one we tried, I used a bit too much force when snapping it and it ruptured so be careful when you activate them. I am experimenting with freezing them or heating them after use to see if it is possible to reactivate them. Will try to update if I have any success. 4 stars

I really cant speak on their preformance because I never recieved them. I can't get in touch with anyone to relate my problem to have them re-shipped to me, so I figured I would at least let everyone know: If you don't recieve your order in full, you never will. I also ordered the Badmitton Family pack which I recieved. But I never recieved the Pro Performance Speedmitton 8Pk Speedlights: Which I really wanted to try out, Pro Performance Speedminton 8pk Speedlights not to mention I paid for.............. 1 star