Inovat Silver Color Mni Velvet Top Motorized Rotating Display Stand for Jewelry Model Hobby Collectible Product and Other Small Stuff Perfect for display Jewelry, watch, digital product, shampoo, glass, bag, Models, Diecast , Jewelry and Collectibles Diameter of display surface: 3.5" Use one AA battery to supply power(battery is not included) Color: Silver, Clear Plate perfect for display products Note: Firstly, when you put in the battery, the plate may not rotate by itself. You need to rotate it a bit by hand in advance to give the product a start force. And then it will run normally.