I've never used anything like this before and I must say it is pretty handy to have. All you need is 3 triple A batteries and you are provided with 5 different gasket sizes to fit bottles large and small. It also comes with a flexible tube that your soap or hand sanitizer will move through. The only problem I had was that the tube kept flipping up in a 7.5 fl. oz. size soap bottle, but once I moved it to a 11.25 fl. oz. soap bottle size I had no issues. This device comes with on/off switch and 3 three different soap dispensing settings. When first using will have to pass your hand under motion detector a few times as the product moves up the tube. This is a really nice thing to have if you are interested in having a touchless soap or hand sanitizer bottle.