I chose this winder because it can be run off "C" batteries as well as the included AC adapter. No plug near my dresser, so this is perfect. Nice clear digital display with an assortment of settings (turns per day, clockwise, counterclockwise or dual). If you're a collector, it offers a series of optional connectors to join several winders together. Extremely quiet, high quality motor. I'm using the winder with a large, heavy Android 50mm+ size watch. It just fits, but operates flawlessly and enhances the accuracy over just winding on your wrist. My only issue is with the clear plastic front door. It's lightweight, but only time will tell how it stands up. Otherwise, a worthwhile product for maintaining your automatic wrist watch.