> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/dynaflex-ii-go/documents/user-manuals/secure-card-reader-authenticator-installation-and-operation-manual.md). # Secure Card Reader Authenticator Installation and Operation Manual

Document Number: D998200595-126 REGISTERED TO ISO 9001:2015 INFORMATION IN THIS PUBLICATION IS SUBJECT TO CHANGE WITHOUT NOTICE. MAGTEK CANNOT BE HELD LIABLE FOR ANY USE OF THE CONTENTS OF THIS DOCUMENT. ANY CHANGES OR IMPROVEMENTS MADE TO THIS PRODUCT WILL BE INCLUDED IN THE NEXT PUBLICATION RELEASE. IF YOU HAVE QUESTIONS ABOUT SPECIFIC FEATURES AND FUNCTIONS OR WHEN THEY WILL BECOME AVAILABLE, PLEASE CONTACT YOUR MAGTEK REPRESENTATIVE. MagTek®, MagnePrint®, and MagneSafe® are registered trademarks of MagTek, Inc. Magensa™ is a trademark of MagTek, Inc. AAMVA™ is a trademark of AAMVA. ANSI®, the ANSI logo, and numerous other identifiers containing "ANSI" are registered trademarks, service marks, and accreditation marks of the American National Standards Institute (ANSI). ISO® is a registered trademark of the International Organization for Standardization. PCI Security Standards Council® is a registered trademark of the PCI Security Standards Council, LLC. EMV® is a registered trademark in the U.S. and other countries and an unregistered trademark elsewhere. The EMV trademark is owned by EMVCo, LLC. The Contactless Indicator mark, consisting of four graduating arcs, is a trademark owned by and used with permission of EMVCo, LLC. Google Play™ store, Google Wallet™ payment service, and Android™ platform are trademarks of Google LLC. Apple Pay®, Apple Wallet®, iPhone®, iPod®, Mac®, and OS X® are registered trademarks of Apple Inc., registered in the U.S. and other countries. iPad™ is a trademark of Apple. Inc. App Store^SM is a service mark of Apple Inc., registered in the U.S. and other countries. Apple and MFi are registered trademarks of Apple Inc. IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used by Apple Inc. under license. The OtterBox® and uniVERSE® trademarks are property of Otter Products, LLC, registered in the U.S. and other countries. MIFARE®, MIFARE Classic ®, and MIFARE® DESFire®, are registered trademarks of NXP Semiconductors Austria GmbH Styria, All rights reserved. The Bluetooth® word mark, logos, and Bluetooth® Low Energy (LE) are registered trademarks owned by Bluetooth® SIG, Inc. Microsoft®, Windows®, and .NET® are registered trademarks of Microsoft Corporation. All other system names and product names are the property of their respective owners. ## Table - Revisions


Rev Number	Date	Notes
100	November 16, 2023	Initial release
110	February 1, 2024	Update all Device Images, Update Device Specifications throughout document; Updated 1.1 Key Features and Components to include NFC Tag/Mifare Classic/Mifare DESFire Light, and Buzzer command support; Added 6.4.1 How to Play a Sequence of Tones; Added Error! Reference s ource not found. Error! Reference source not found.. miscellaneous clarifications and corrections.
120	April 12, 2024	Update Table 1-2 - DynaFlex II Go Accessories with current USB Type A-C and type C cable Part Numbers and Descriptions, Add section 7.5.7 DynaFlex II Go Bluetooth® Low Energy (LE) Sleep Mode, Add 6.2 Physical Button Operation, Add reference to BLE Sleep mode in 6.3 About Operating Modes
121	May 15, 2024	Updated 7.6.2 MSR Payment Transaction Successful (Connected via USB)and 7.6.6 MSR Payment Transaction Successful (Connected via Bluetooth® LE) with correct LED behavior for MSR Transactions
122	February 14, 2025	Removed UL language from Boiler Plate and updated Safety Language in Appendix D.
123	February 27, 2025	Removed the word "preferred" from wired connection specification for USB 3.0 in Appendix A Technical Specifications.
124	March 11, 2025	Remove outdated language in Appendix D: · Removed UL and Canada UL statement (this is included in the “safety” section) · Modified the EU statement to reflect the correct DoC · Added the UKCA statement · Modified the Australia statement per the updated requirements and added link to the DoC
125	April 2, 2025	Add MIFARE Plus, remove MIFARE Lite in 7.9.5 How to Tap Contactless NFC Tags / MIFARE Classic / MIFARE DESFire /MIFARE Plus Cards and Send Pass-through Commands
126	June 5, 2025	Update Appendix A Technical Specifications storage and operating relative humidity values from 5% to 90% RH non-condensing to Up to 90% RH non-condensing.

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