Holy Crap! The only thing I did from the first night to the second was charge them. Great value, Five Stars! These work only in the item it grabs is quite thin. I stand for 9 hours. Note that they offer these in many colors and should appeal to many individuals. Perfect for a special occasion! It didnt come with a little wrench/screwdriver that actually fit the head of the screws used, so I ended up needing to wait until I had a toolkit to put it together. How hard is it to measure?Otherwise, they are lightweight and a pretty simple. Note: the following observations are the result of actual hands-on testing.