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S4A-QR704 QR Code Access Card Reader

Dual Scanning & Card Recognition: Reads 2D QR codes/barcodes up to 30 cm and RFID cards (125KHz/13.56MHz) up to 5 cm.
Versatile Communication Protocols: Supports international standard Wiegand 26/34, RS232, RS485, TTL, and USB communication.
Flexible Dual Power Options: Compatible with DC 9V–24V external supply or USB 5V input with low standby power (< 30mA).
IP65 Waterproof & Durable Build: Features a rugged tempered glass code window paired with PVC plastic housing for reliable protection.
Wide-Angle 360° Scanning: Equipped with a 360° rotation angle, 84° diagonal scan angle, and integrated night fill light.
  • Brand:

    S4A
  • Item NO.:

    S4A-QR704
  • Specifications
  • Wiring Diagram
  • Package

S4A-QR704 QR Code Access Card Reader


The S4A-QR704 is a versatile QR Code Access Card Reader engineered for seamless integration into modern door access control systems. Constructed from durable tempered glass and PVC plastic with IP65 waterproof protection, it supports fast scanning of 2D QR codes and barcodes along with dual-frequency RFID card credentials (125KHz / 13.56MHz). With flexible power support (DC 9V–24V / USB 5V) and comprehensive communication interfaces including Wiegand 26/34, RS232, RS485, TTL, and USB, the S4A-QR704 delivers reliable, high-speed access management.


Parameter Specification
Model Number S4A-QR704
Product Name QR Code Access Card Reader
Power Supply DC 9V–24V / USB 5V
Operating Current Standby < 30mA; Fill Light ≤ 100mA
Communication Interfaces Wiegand 26/34, RS232, RS485, TTL, USB
RFID Frequency 125KHz / 13.56MHz (ID / IC Options)
Supported Card Types EM, Mifare, 15693, Desfire (Options)
Scan Type QR Code, Barcode
Sensing Distance Card: 3–5 cm | QR Code: 5–30 cm
Reading Angle 360° Rotation; Elevation ±55°; Deflection ±55°
Scanning Angle 72° (Horizontal), 54° (Vertical), 84° (Diagonal)
Material Tempered Glass + PVC Plastic
Waterproof Grade IP65
Dimensions 86 * 8 mm
Operating Temperature -40°C to +85°C
Operating Humidity 10%–90% RH (Non-condensing)
Night Lamp / Fill Light Yes

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