Elegant PU leather Dual watch winder with transparent acrylic window and soft flannel. Protect your watch from scratches and keep it running. Give this exquisite Watch Winder a comfortable touch and nice look. Come with high quality adjustable pillow. Fit for a watch dial diameter range smaller than 58mm, dial thickness less than 28mm and watch circumference from 180mm to 210mm. DO NOT support the use of batteries. Please use a mobile phone power adapter to power this product (output voltage:3V-9V). Never use the power adapter of any other electrical appliance. Quiet motor. Extremely silent when running. Compatible with mechanical watches only, NOT Quartz watches (e.g. Seiko Kinectic).