Features:Made of high quality material, solid, durable and good performance.Badusb, USB, microSD virtual keyboard, TF memory Initialization, SD, card ... initialization, failure, thing, to, check:Yes, a, card, pluginIs, a, card, inserted?Is, your, wiring, correct?Did you change the chipSelect pin to match your shield or module?Initializing, SD, card... Wiring, is, correct, and, a, card, is, present.Card Type: SDHCThe volume type is FAT32Volume size (bytes): 3519021056Volume Size (KB): 3436544Volume size (Mbytes): 3356File, find, on, the, card (name, date and size, in, bytes)Specification:Material: pc+metalSize: 3.9 x 2.1cm/1.54 x 0.83inColor: as shownPackage Contents:1 x Virtual Keyboard Module1 x Pin HeaderOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.