Features: Interface:UART Rich application support Support 125KHz card reading It supports various cards card reading operation 7941E card reader module, integrated high performance card reading radio frequency circuit and antenna Specifications: Voltage:DC 5V Current:40mA for D1 D0:data output DATA1,DATA0 FOR:NC Operating Temperature:-20~70 Celsius EM4100 Card Reading Distance:>8cm Interface Output Introduction: UART Interface Output UART Interface Output Data Head Length Card Type Card Type BCC Check Data End 0x02 0x09 0x01 SN0~SN3 XOR Check Except Data for Head And Data End 0x03 Card Type: 0x02 EM4100 0x01 for MIFARE 1K 0x03 for MIFARE 4K 0x10 for HID Card 0x11 T5567 0x20 2nd Card 0x21 ISO14443B 0x22 FELICA 0x30 15693 Label 0x50 CPU Card 0x51 Sector Information 0xFF Keyboard Data For example:the data received by serial port tool is 02 0A 02 2E 00 B6 D7 B5 F2 03, then The first byte 0x02 means data start The second byte 0x0A means the whole data length is 10 bytes, which includes data start and data end The third byte 0x02 means the card type is EM4100 The fourth to eighth byte (0x2E 0x00 0xB6 0xD7 0xB5) means the read card number, and the fourth byte 0x2E is hidden card number The ninth byte 0xF2 means BCC check of second byte to eighth byte The tenth byte 0x03 means data end Notice: Keep away from interference source, and strong interference signal may affect card reading Select linearity power can improve the card reading distance and effect; switch power may attenuate the distance but will not influence normal operation The module can operate normally in the range of 3-5V, please do not use higher voltage This module has high frequency signal, so it may cause some interference to the analog circuit. Uses should place the module a little far away from the buzzer; if the distance is too close, the sound of the buzzer will be low Applications: Attendance Fingerprint Read Write Module Entrance Guard Intercom Read Write Module Replicator Attendance fingerprint card reader module Entrance guard intercom card reader module Size:4.7x2.6cm/1.85x1.02inch Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you! Package Includes: 1x EM4100 8CM RFID Reader Wireless Module 1x Cable