Features Simple Card Reading: This smart card reader adopts 13.56Khz non-contact frequency, the card reader does not need to be driven, and the card reading is stable and accurate. Fast Response: USB IC card reader with excellent performance, response time less than or equal to 0.2S, read and write distance up to 15cm, very reliable. Intelligent Production: This intelligent access control reader has IC USB interface and 1.4m long extension cable covered with durable PVC material. Good Compatibility: CAC card reader adopts micro-electronic RF module, which makes it better compatible with Windows, LIUNX, etc. Better Design: The IC card reader has a built-in 20 dB buzzer to ensure effective alerts, while the LED has two colors, red and green, 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 Package List 1 x CAC Card Reader 1 x USB Charging Cable 5 x IC Card