| Feature | X3 All-in-One | ACR39U-U1 | Omnikey 3121 | |---------|---------------|-----------|---------------| | Contact | ✓ | ✓ | ✓ | | Contactless (13.56 MHz) | ✓ | ✓ | ✓ | | Magnetic stripe | ✓ | ✗ | ✗ | | Fingerprint (optional) | ✓ | ✗ | ✗ | | Price range | $40–80 USD | $50–70 | $120–150 | | SDK quality | Varies (OEM) | Excellent | Good | | Linux support | Good | Excellent | Good |
: Intuitive interface simplifies complex EMV processes. X3 Smartcard All In One
The "All In One" designation refers to its bundled nature, combining multiple specialized tools into a single package to minimize the need for disparate applications. Ubuy France EMV X2 and X3 Engines | Feature | X3 All-in-One | ACR39U-U1 |