UART Interface: Features a UART interface for seamless communication. Rich Application Support: Offers extensive support for various applications, enhancing versatility. 125KHz Card Reading: Capable of reading 125KHz cards, ensuring broad compatibility. Diverse Card Reading Operations: Supports a wide range of card reading operations for flexible use. Integrated High-Performance Module: The 7941E card reader module integrates a high-performance radio frequency circuit and antenna for reliable card reading. Voltage & Current: Operates on DC 5V with a current of 40mA. EM4100 Card Reading Distance: Achieves a reading distance of over 8cm for EM4100 cards. Interface Output Introduction: Provides UART interface output with detailed data structure including data header, length, card type, card number (SN0-SN3), BCC check, and data end. Supported Card Types: Compatible with EM4100, MIFARE 1K, MIFARE 4K, HID cards, T5567, 2nd Card, ISO14443B, FELICA, 15693 Tag, CPU card, Sector information, and Keyboard data. Example Data Interpretation: Detailed explanation of data received via serial port tool, illustrating how to interpret each byte for card type, number, and BCC check. Important Notes: Keep away from interference sources for optimal card reading. Linear power supply improves reading distance and effect; switch power supply may reduce distance but won't affect normal operation. Operates normally within 3-5V; avoid higher voltages. High-frequency signal may interfere with analog circuits; place module away from buzzers to prevent low sound. Ideal for attendance, fingerprint readers, access control, intercoms, and replicators.