Features 1、Simple Reading: Using 13.56Khz non contact frequency, the card reader does needs no driver for stable and accurate reading. 2、Quick Response: The response time is less or equal to 0.2S with a long read and write distance up to 15cm, very reliable. 3、Smart Crafting: With IC USB interface as well as 1.4m extended cable length, which is covered with durable PVC material. 4、Broad Matching: Microelectronic radio frequency module enables better compatibility with for Windows, for LIUNX and so on. 5、Better Designs: Built in 20dB buzzer ensures effective reminding, while the LED has red and green colours for standby and swipe modes. Specification Item Type: CAC Card Reader Model: R20C Material: PVC Working Current: 100mA Working Voltage: 5V Power: 1W Working Frequency: 13.56Khz Card Reading Time: 0.2s Induction Distance: Approx. 0 ~ 15cm / 0 ~ 5.91in Communication Interface: USB Interface Power Supply: USB Power Supply Applicable Cards: MF S50 S70 etc. 14443A Compatible System: For Windows, for LIUNX, for Android and other systems. Package List 1 x CAC Card Reader 1 x USB Charging Cable 5 x IC Card