The ACR3901U-S1 Secure Bluetooth Contact Smart Card Reader combines the latest technology in the smart card reader industry with Bluetooth connectivity. This compact wireless smart card reader blends sophisticated technology smart card applications installed on Bluetooth devices such as smartphones and tablets. Bluetooth interface USB 2.0 Full-Speed interface Power supply: Battery-powered (Li-ion battery recharged via Micro-USB port) USB power supply (via PC connection mode) Supports ISO 7816 Class A, B, and C (5 V, 3 V, 1.8 V) cards Supports microprocessor cards with T=0 or T=1 protocol Supports memory cards Supports (protocol and parameter selection) Short-circuit protection Supports -128 encryption algorithm Supports PC/SC Supports CT- (via PC/SC ) USB firmware upgrade capability Supports Android 4.3 and above Supports iOS 8.0 and above Baud rate: 1 Mbps Connector type: Micro-USB Protocol: USB Rate: USB Full Speed (12Mbps) Power: Powered by USB port Card Slots: 1 full-size card slot Standard: ISO 7816 Parts 1-4, Class A, B, and C (5V, 3V, 1.8V) Protocol: T=0; T=1; Supports memory cards Color: White Material: plastic Package Contents: 1 * Reader/Writer Device 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.