1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your ACS ACR1581U DualBoost III USB Dual Interface Reader. This device is designed to facilitate secure transactions and data exchange through both contact and contactless (NFC) smart card technologies. Please read this manual thoroughly before using the device to ensure proper functionality and safety.
2. Safety Information
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping or subjecting the device to strong impacts.
- Do not attempt to disassemble or modify the device. This will void the warranty.
- Keep the device away from liquids and corrosive materials.
- Use only the provided or recommended accessories.
- Ensure proper ventilation when operating the device.
3. Package Contents
Please check the package contents upon receipt. If any items are missing or damaged, contact your vendor immediately.
- ACS ACR1581U DualBoost III USB Dual Interface Reader
- USB Cable (integrated)
- Quick Start Guide (if included)
4. Product Overview
The ACS ACR1581U DualBoost III is a versatile smart card reader supporting both contact and contactless smart cards. It features a compact design and a USB interface for easy connectivity to various systems. The device is equipped with indicators for power and card activity.

Figure 1: ACS ACR1581U DualBoost III USB Dual Interface Reader. This image displays the white-colored reader unit with the NFC logo prominently visible on its surface, indicating its contactless capability. The ACS brand logo is also present at the bottom. A white USB cable extends from the top of the device, connecting it for power and data transfer. The device has a sleek, rectangular design with rounded edges.
5. Setup
- Connect the Reader: Plug the USB connector of the ACR1581U reader into an available USB port on your computer or host device.
- Driver Installation:
- For most modern operating systems (e.g., Windows 10/11, macOS, Linux), the necessary drivers will install automatically upon connection (plug-and-play).
- If automatic installation does not occur, or if you are using an older operating system, please visit the official ACS website (www.acs.com.hk) to download and install the latest drivers for the ACR1581U model.
- Verify Installation: After driver installation, the device should be recognized by your system. You can typically verify this in your operating system's Device Manager (Windows) or System Information (macOS/Linux).
6. Operating Instructions
6.1. Using Contact Smart Cards
- Ensure the reader is connected and recognized by your system.
- Insert the contact smart card into the card slot on the reader with the chip facing upwards and towards the reader until it clicks into place.
- The reader's indicator light will typically illuminate or flash to show card detection and activity.
- Follow the instructions of your specific application software to perform transactions or access data.
- To remove the card, gently pull it out from the slot.
6.2. Using Contactless (NFC) Smart Cards
- Ensure the reader is connected and recognized by your system.
- Place the contactless smart card or NFC-enabled device directly onto the NFC symbol area of the reader.
- Hold the card steady until the transaction or data exchange is complete. The indicator light will confirm activity.
- Remove the card once the operation is finished.
7. Maintenance
- Cleaning: Use a soft, dry, lint-free cloth to clean the exterior of the reader. Do not use liquid cleaners, aerosols, or solvents.
- Storage: When not in use, store the reader in a clean, dry environment, away from dust and direct sunlight.
- Cable Care: Avoid bending or twisting the USB cable excessively to prevent damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not recognized by computer. | USB cable not properly connected; missing or incorrect drivers; faulty USB port. | Ensure USB cable is securely plugged in. Try a different USB port. Install or update drivers from the ACS website. Restart your computer. |
| Contact card not detected. | Card inserted incorrectly; dirty card chip; faulty card. | Re-insert the card with the chip facing up. Clean the card chip with a soft cloth. Try a different card to rule out a faulty card. |
| Contactless (NFC) card not detected. | Card not placed correctly; card not NFC-enabled; interference. | Ensure the card is placed directly on the NFC symbol. Verify the card is NFC-enabled. Remove any metallic objects or other NFC devices nearby that might cause interference. |
| Indicator lights not working. | No power; device malfunction. | Check USB connection. Try a different USB port. If the issue persists, contact support. |
9. Specifications
- Brand: ACS
- Model: ACR1581U (W128426678)
- Connectivity Technology: USB
- Special Feature: Dual interface (Contact & Contactless/NFC)
- Compatible Devices: Computer systems with USB ports (as per operating system support)
- Operating System Compatibility: Alle Betriebssysteme (All Operating Systems - as per product data, typically refers to major OS like Windows, macOS, Linux)
- Item Weight: Approximately 5.3 ounces (150 grams)
10. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your purchase or visit the official ACS website. The manufacturer's website typically provides the most up-to-date support resources, FAQs, and contact information.
ACS Official Website: www.acs.com.hk





