This video light works great. It is charged via USB and provides a lot of light at the highest level. It can also be darkened. It also comes with matte clear, blue and amber filters. It attaches to your mobile phone with an integrated clip. It comes with a light bar that allows you to attach it to your camera with a tripod mount. It also has an adjustable bracket for attaching to your camera's hot shoe. That way you can tilt it and bounce light off the ceiling if you want. I left it on at full brightness to see how long the battery would last and it lasted over an hour. If you need more time, they are cheap enough that you can easily get a replacement.