Smart card + SIM card smart card reader CR333 is a contact smart card reader, smart card and SIM card two-in-one, with smart card slot and SIM card slot, supports separate, not simultaneous use. Supports Class A, B and C (5V, 3V and 1.8V) smart cards that comply with ISO 7816 standard, and it communicates with the PC environment through a USB interface compatible with different operating systems. System support XP and above systems Linux Fedora FC8 and above systems OS 10.6.2 and above systems Product features: USB2.0 standard Support hot swap Smart card/SIM card dual card slot design High-quality socket, can support at least 100,000 card insertions Color: Black Material: plastic Package Contents: 1 x Card Reader 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.