{"product_id":"usb-rfid-reader-125khz-em4100-tk4100-13-56mhz-s50-s70-windows-linux","title":"USB RFID Reader — 125kHz EM4100\/TK4100 \u0026 13.56MHz S50\/S70, Windows \u0026 Linux","description":"\u003ch2\u003eUSB RFID Reader — 125kHz EM4100 \/ TK4100 \u0026amp; 13.56MHz S50 \/ S70, Plug-and-Play\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003edual-frequency USB RFID reader\u003c\/strong\u003e supports both \u003cstrong\u003e125kHz\u003c\/strong\u003e (EM4100, TK4100, HID Prox) and \u003cstrong\u003e13.56MHz\u003c\/strong\u003e (Mifare S50, S70, ISO 14443A) RFID card standards in a single compact device. It connects via USB and appears as a standard HID keyboard device — no drivers required on Windows, Linux, or macOS. When a card is presented, the reader outputs the card UID as keystrokes directly into any text field, making it instantly compatible with any software that accepts keyboard input.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e125kHz and 13.56MHz (dual)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Cards (125kHz)\u003c\/td\u003e\n\u003ctd\u003eEM4100, TK4100, HID Prox, EM4200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Cards (13.56MHz)\u003c\/td\u003e\n\u003ctd\u003eMifare S50 (1K), S70 (4K), ISO 14443A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUSB HID (keyboard emulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDriver Required\u003c\/td\u003e\n\u003ctd\u003eNone (plug-and-play)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Format\u003c\/td\u003e\n\u003ctd\u003eCard UID as keyboard input (decimal or hex)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRead Range\u003c\/td\u003e\n\u003ctd\u003e3–8cm (card dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOS Compatibility\u003c\/td\u003e\n\u003ctd\u003eWindows XP\/7\/10\/11, Linux, macOS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eUSB 5V (bus powered)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003e125kHz vs 13.56MHz RFID — Key Differences\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003e125kHz (LF)\u003c\/th\u003e\n\u003cth\u003e13.56MHz (HF)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Cards\u003c\/td\u003e\n\u003ctd\u003eEM4100, TK4100, HID\u003c\/td\u003e\n\u003ctd\u003eMifare S50, S70, NFC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRead Range\u003c\/td\u003e\n\u003ctd\u003e3–8cm\u003c\/td\u003e\n\u003ctd\u003e1–5cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Storage\u003c\/td\u003e\n\u003ctd\u003eRead-only UID\u003c\/td\u003e\n\u003ctd\u003eRead\/write memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecurity\u003c\/td\u003e\n\u003ctd\u003eLow (UID only)\u003c\/td\u003e\n\u003ctd\u003eHigher (encrypted sectors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Use\u003c\/td\u003e\n\u003ctd\u003eAccess control, attendance\u003c\/td\u003e\n\u003ctd\u003ePayment, smart card, NFC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose This USB RFID Reader?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eDual frequency\u003c\/strong\u003e — reads both 125kHz and 13.56MHz cards without switching devices\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003ePlug-and-play HID\u003c\/strong\u003e — no driver installation, works on Windows, Linux, macOS instantly\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eKeyboard emulation\u003c\/strong\u003e — outputs UID to any text field, compatible with any software\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eUSB bus powered\u003c\/strong\u003e — no external power supply needed\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCompact design\u003c\/strong\u003e — fits on any desk or embedded in kiosk panels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEmployee attendance and time tracking system\u003c\/li\u003e\n\u003cli\u003eDoor access control card reader\u003c\/li\u003e\n\u003cli\u003eInventory management RFID scanning\u003c\/li\u003e\n\u003cli\u003eArduino \/ Raspberry Pi RFID project (via USB serial)\u003c\/li\u003e\n\u003cli\u003eLibrary book and asset tracking\u003c\/li\u003e\n\u003cli\u003eRFID card UID reading and cloning research\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 × USB RFID Reader (125kHz + 13.56MHz dual frequency)\u003c\/li\u003e\n\u003cli\u003e1 × USB cable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991449915627,"sku":"\u003cnone\u003e","price":29.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/usb-rfid-reader-em4100-tk4100-125khz-13-56mhz-s50-s70-windows-linux.webp?v=1761801776","url":"https:\/\/keszoox.com\/products\/usb-rfid-reader-125khz-em4100-tk4100-13-56mhz-s50-s70-windows-linux","provider":"Keszoox","version":"1.0","type":"link"}