I bought this watch winder a bit in the blind because the description at the time did not specify the power source (battery or outlet) of the winder.  It does require a plug near by to work.  It is very quiet.  Mine is sitting near my bed, and I do not hear it operating.  There is a form that the watch wraps around in order to install the watch into the winder's slot.  The form is easily removable and has a spring loaded back so you can close up your watchband and slip the watch on the form with ease.  The rotation time is set by a switch on the back, immediately below the power switch so you do have to be careful not to flip one when you wanted to set the other.  The instructions are a bit lacking and obviously translated to English, but they are sufficient.  My watches are kept fully wound when in the device.  Overall, this is a good entry-level watch winder.