1.5" keychain digital photo frame,with steel back,patent products,favorite as promotion,festival,ads gift,digital ... 1.5" keychain digital photo frame1.Diagonal: 1.5 inch screen 2.Resolution: 128 * 128 3.Picture formats: JPG,BMP4.Buttons ... .0 11.Operation system: win 2000 / XP 12.Material: plastic+stainless steel back 13.Accessories: USB cable, key buckle, instruction manual, white ...