Description:1. Is a RFID reader module.2. It integrates high performance RF circuits and antennas.3. Built in buzzer and LED indicator.4. It can support read ID and IC card. Parameters:Item Name: 7941D RFID Wireless Read ModuleWork voltage: DC 5VWork current: 40mARead frequency: 125KHz Communication Interface: Wiegand(5ins)Read distance: about 8cm(For EM4100 Card)Read distance: about 5cm(For S50 S70,Desfire,FM1208 Card)Work Temperature: -20~85Work Humidity: 0%~95%RHSize: 46*16*6.5mm Interface Description:1>. VCC:Input for positive of work voltage.2>. GND:Input for negative of work voltage.3>. D0:Data output terminal.Same to DATA0.4>. D1:Data output terminal.Same to DATA1.5>. FOR:Format selection.Default W26.It is W34 format if connect to GND. Application:1>. Attendance2>. Access control3>. Industrial control Note:1>. It just need three wires.2>. Module just can send data.3>. User need write code according to UART Protocol Introduction as shown.4>. Please stay away from interference sources. Package:1pcs 7941D RFID Wireless Read Module1pcs 5Pin 1.27mm 150mm Cable About this item Note: 1. Module just can send data. 2. User need write code according to UART Protocol Introduction as shown. 3. Please stay away from interference sources. Integrate high performance RF circuits and antennas. Built in buzzer and LED indicator. Support read ID and IC card. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. Note: 1. Module just can send data. 2. User need write code according to UART Protocol Introduction as shown. 3. Please stay away from interference sources. Integrate high performance RF circuits and antennas. Built in buzzer and LED indicator. Support read ID and IC card. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.