DynaFlex II Go

The DynaFlex II Go is a portable secure card reader authenticator (SCRA) that reads contact chip, contactless (NFC), and magnetic-stripe cards in a compact, handheld device. It encrypts cardholder data at the point of read (SRED) and connects over USB or Bluetooth LE — suited to both mobile and countertop acceptance. It uses the shared Dyna-family MMS command set, so everything you build against it is documented in the API & Command Reference and linked below.

Key Capabilities

• Contact, contactless (NFC), and magnetic stripe card reading in one device

• SRED point-to-point encryption at the moment of read (TDES / AES DUKPT)

• NFC/MIFARE pass-through and NFC card emulation (DynaCast)

• Optional barcode reader (BCR) for scanning outside a transaction

• Portable and battery-powered, with status LEDs and a buzzer for prompts

• PCI PTS POI–approved SCRA (no PIN entry — see the DynaFlex II PED for PIN)

How it Connects

Reference Section	Information Available
Quickstart	The Go connects to a host over USB or Bluetooth LE. For wiring, pairing, and a first end-to-end transaction, start with the Quickstart.

Build with the DynaFlex II Go

Reference Section	Information Available
Programmer's Manual	The MMS command set scoped to the Go: message format, commands, notifications, configuration, and status codes.
Commands	The commands the Go supports, each linking into the shared reference.
Command Support Across Products	The full device Command matrix, if you're building for more than one Dyna reader.
Security & Keys	DUKPT (3DES→AES), MAC, KSNs, encryption/decryption, and PCI requirements.
NFC/MIFARE	working with contactless cards and tags (NTag, Classic, DESFire, Plus).

Downloads & Compliance

Reference Section	Information Available
Firmware & Downloads	The MMS command set scoped to the Go: message format, commands, notifications, configuration, and status codes.
Compliance	Compliance documentation for the Go, including inspection documents.

For more help

Need Help?

For additional support, please contact MagTek Support:

Technical Support:

• 📧 Email: [e-mail]

• 📞 Phone: [phone] (US)

• 🕐 Hours: Monday-Friday, 5:30 AM - 5:00 PM PST

Online Resources:

• 🌐 Support Portal: developer.magtek.com

Documentation Feedback:

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