1. Compatible with USB universal smart card reader: Goverment1D, National ld, , OWA, DKO, ""Ko, , card, etc. 2. No need for drivers, no settings, automatic identification, super compatibility 3. The ABS material shell of the contact smart card reader can prevent high temperature and wear without blocking adjacent ports, saving more space for nearby USB devices 4. Small and portable unique design, the card reader can be unfolded and closed to save your space Product Description: Model: CR335-OPEN-A & CR335-OPEN-C Interface: USB Installation : external requirements: Windows7/8/10, Linux, OS Style: Simple Type: Smart Card Reader Applicable objects: general size: 13 x 2.6cm Material: ABS colour: white Package Contents: 1 x USBcard reader 1 x Chinese and English instructions Only 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.