To whom it may concern GMMC GmbH Kehlbergstrasse 109 8054 Graz Austria UID/VAT: ATU68813509 EORI Nr.: ATEOS1000079439 Tel: +43 664 415-62-60 office@gmmc-biz.com To whom it may concern GMMC GmbH herewith confirms that the available USB host communication interface types USB-CCID, USB-CDC VCOM and USB-HID KBD have no influence on the RF parameters of the GMMC Pocket NFC Multi- Protocol reader/writer. The RF behavior is given by the analog RF matching circuitry and components and is not linked to the digital host communication interface. Graz, 12 December 2019 Managing Director: DI Michael Ganzera | Company Registration Number: FN418591a, Tax #: ATU68813509, EORI Nr:ATEOS1000079439 Banking information: UniCredit Bank Austria AG (EURO): BIC/SWIFT code: BKAUATWW, IBAN: AT481200010008504317 Commercial Court: Landesgericht fr Zivilrechtssachen Graz Austria 1