The shell is made of high-end material, which is tougher than ordinary ABS with TYPE-C interface. Compared with Mirco Android interface, there is no change in speed, but it supports positive and negative insertion, which is more convenient. Stronger stainless steel housing, so more !IC card copy method: (need to connect to Android phone or computer to operate) Android phone and computer software download QR code on the packaging plastic bag, Android phone does not need to be driven, plug and play (send OTG converter) to install PCR532.APPCan read and write: UID, CUID, UFUID, FUID (rolling code cannot be copied)The computer software is compatible with the PN532 software.Colour:blackMaterial:plasticDue to different batches, there may be differences in product appearance and printed text, which not affect usePackage Contents:1 * Access card decoder1 * OTG Adapter2 * Card1 * USB CableOnly the above package content, other products are not included.Note: Light reflection 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.