Function:1. CONTACTLESS: The card reader is a contactless intelligent card reader designed with contactless RF technology. A universal card reader that can be easily plugged in and out during use, without the need for external power or user installation of any driver software. The reading is stable, accurate and reliable.2. FAST RESPONSE: Fast reading, the speed is less than or equal to 0.2S, the maximum reading and writing distance is up to 15cm, the card reading interval is less than or equal to 0.2S, supports reading and writing of IC cards.3. FINE WORKMANSHIP: Using IC USB interface. The interface cable is wrapped in ABS material on the outside, which is scratch-resistant and durable. The surface is frosted and is not easy to slip and has better transmission efficiency.4. STRONG COMPATIBILITY: Stable performance and strong compatibility, using microelectronic RF modules, for Windows, for LIUNX, for Android and other systems plug and play, without the need to install driver software.5. EASY TO USE: The card reader is equipped with a built-in buzzer design, with a sound of up to 20dB, providing effective reminders. The LED light design is red for standby mode and green for card swiping mode, making the reader easy to use and convenient for beginners.Specification:Item Type: NFC Reader/WriterMaterial: ABSWorking Current: 100mAWorking Voltage: 5VPower: 1WT5577 Card Frequency: 125KHZUID Buckle Frequency: 13.56MHZCard Reading Time: 0.2sSensing Distance: Approx. 0 to 15 cm / 0 to 5.9 inchesCommunication interface: USB interfacePower: USB powerApplicable cards: MF S50, S70, etc. 14443ACompatible systems: For Windows, for LIUNX, for Android and other systems.Package list:1 x card reader 5 x T5577 cards 5 x UID buckle 1 x USB data cable