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The ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader is a compact wireless smart card reader that combines the latest technology in the world of smart card readers. Read more
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In stock (2)
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ACR3901U-S1 ACS Secure Bluetooth ® Contact Card Reader combines the latest technology in the world of smart card readers with Bluetooth ® connectivity. This compact and wireless smart card reader brings together sophisticated technology with fresh design to meet different requirements in various smart card based applications using Bluetooth-enabled devices such as smart phones and tablets.

ACR3901U-S1 supports ISO 7816 Class A, B, and C smart cards (5 V, 3 V, and 1.8 V) and most memory cards in the market, including microprocessor cards with T=0 and T=1 protocol. ACR3901U-S1 has both USB Full Speed and Bluetooth 4.0 interface for smart cards. It has a read/write speed of up to 600 Kbps. With its compact design and rechargeable Lithium-ion battery, ACR3901U-S1 is extremely portable and convenient for use anytime, anywhere.

ACR3901U-S1 offers in-field firmware upgrade to help the user cope with the fast-changing technology utilized by different applications. With this feature, stakeholders will be able to save valuable cost and time and provide utmost convenience to users.

ACR3901U-S1 uses Bluetooth ® technology that allows easy integration without employing any physical connection to any terminal. Equipped with AES-128 encryption algorithm, it supports devices running on Android 4.3 and above, iOS 8.0 and above, Windows ®, and Mac OS ®.

ACR3901U-S1 is PC/SC and CCID-compliant, making it easy to install and use in any computer-based environment. Its drivers are compatible with the Windows ® operating system, Linux ®, and Mac OS ®.

With its numerous features, the ACR3901U-S1 is the perfect smart card reader for your smart card solution.


  • Bluetooth ® Interface
  • USB Full Speed Interface
  • Power Source
    • Battery-Powered (incorporates a Litium-ion battery rechargeable through Micro-USB port)
    • USB-Powered (through PC-linked mode)
  • CCID Compliance
  • Smart Card Reader:
    • Supports ISO 7816 Class A, B, and C (5 V, 3 V, 1.8 V) cards
    • Supports microprocessor cards with T=0 or T=1 protocol
    • Supports memory cards
    • Supports PPS (Protocol and Parameters Selection)
    • Features Short-Circuit Protection
    • Supports AES-128 encryption algorithm
    • Contact Interface:
  • Built-in Peripheral:
    • Three single-color LEDs
  • Application Programming Interface:
    • Supports PC/SC
    • Supports CT-API (through wrapper on top of PC/SC)
  • USB Firmware Upgradeability
  • Supports Android 4.3 and later
  • Supports iOS 8.0 and later

Technical specifications

Physical Characteristics
Dimensions (mm) 94.0 mm (L) x 60.0 mm (W) x 12.0 mm (H)
Weight (g) 30.8 g (59.7 g with cable ± 5 g tolerance)
Bluetooth Interface
Protocol Bluetooth ® (Bluetooth 4.0)
Power Source Rechargeable Lithium-ion Battery (charging through USB)
Speed 1 Mbps
USB Interface
Protocol USB CCID
Connector Type Micro-USB
Power Source From USB port
Speed USB Full Speed (12 Mbps)
Cable Length 1 m, Detachable
Contact Smart Card Interface
Number of Slots 1 Full-sized Card Slot
Standard ISO 7816 Parts 1-3, Class A, B, C (5 V, 3 V, 1.8 V)
Protocol T=0; T=1; Memory Card Support
Built-in Peripherals
LED 3 single-colors: Red, Blue and Green
Other Features
Encryption In-device AES encryption algorithm
Firmware Upgrade Supported
Certifications/Compliance EN 60950/IEC 60950
ISO 7816
USB Full Speed
Bluetooth ®
EMVÃ Level 1 (Contact)
VCCI (Japan)
MIC (Japan)
Microsoft ® WHQL
Device Driver Operating System Support
Device Driver Operating System Support Windows ®
Linux ®
MAC OS ® 10.7 and later
Android 4.3 and later
iOS 8.0 and later
Warranty 1 year  
More info Product PDF


Manuals & Datasheets for ACR3901U-S1
Product Presentation

Product Presentation of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

Technical Specification

Technical Specification of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

Reference Manual

Reference Manual of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

User Manual

User Manual of the ACR3901U-S1 ACS Secure Bluetooth® Contact Card Reader

User Guide (iOS)

User Guide for ACS SmartAccess app (iOS)

User Guide (Android)

User Guide for ACS SmartAccess app (Android)

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