Are my watches compatible with this watch winder? This watch winder is designed for watches with a case diameter of less than 42mm. To check if your watches are compatible, measure the width of the watch face from one side to the other. If it's less than 42mm (about 1.65 inches) How does the watch winder operate? This watch winder offers bidirectional rotation with two modes: Mode B rotates for 2 minutes and rests for 6 minutes, repeating continuously; Mode L rotates for 10 minutes in each direction for 3 hours, followed by a 9-hour rest. Is it quiet during operation? Yes, the watch winder is designed to operate quietly, making it suitable for use in bedrooms without disturbing your sleep. What power sources does it use? This watch winder supports universal USB power interfaces and can be powered by various sources, including power banks, power adapters, power strips, and laptops. What should I do if the power reserve is low and the watch winder cannot wind the watch? Manually winding the small knob on the side of the watch 10-15 turns can increase its power reserve, especially if it hasn't been worn for a while or if it requires an initial power boost. Watch winder Crocodile Black 2 Slot Buying Options Carbon Black 2 Slot Buying Options Carbon Black 1 Slot Buying Options Crocodile Black 1 Slot Add to Cart Customer Reviews 3.9 out of 5 stars 106 3.9 out of 5 stars 106 4.2 out of 5 stars 116 4.2 out of 5 stars 116 Price $32.99$32.99 $32.99$32.99 $24.99$24.99 $26.99$26.99 Number of slots 2 2 1 1 Rotation Mode 2 2 2 2 Material Type Faux Leather Faux Leather Faux Leather Faux Leather Power Source AC Adapter / Battery Powered AC Adapter / Battery Powered AC Adapter / Battery Powered AC Adapter / Battery Powered Batteries Required ✘ ✘ ✔ ✔