This is a contact smart card reader, smart card and two in one, there are smart card slot and slot, support single, support simultaneous use. It supports type A, type B and type C (5V, 3V and 1.8V) smart cards that comply with the ISO 7816 standard. It communicates with the PC environment through a USB interface compatible with different operating . Feature: USB2.0 standard Support hot swap Smart card/, dual card slot design High-quality socket, which can support at least one hundred thousand card insertion and removal Specification: Model: CR317 Interface: USB 2.0 Support card type: smart card + dual card slot design length: 90cm Product size: 89 x 72 x 10mm System support: for WindowsXP,for Windows7/8/8.1/10,for Windows Vista,for OS Material: ABS colour: White Package Contents: 1 x USB 2.0 Smart Card Reader Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.