SMARTSOUND CORPORATION 4F, 171, Yangjeacheon-ro, Gangnam-gu, Seoul, South Korea Jan 13, 2020 Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Class II Permissive Change Cover Letter SUBJECT: Class II Permissive Change for FCC ID : 2ADIYWP-100 The intension of this application is to enable the modular FCC ID: 2ADIYWP-100, granted on 01/10/2020 to be integrated in RFID Module, Model : WP-100 The module installed into host platform mentioned above is electronically and mechanically identical to the original certified module. The Original FCC testing on module under FCC ID : 2ADIYWP-100 was performed with an antenna of higher gain, and the antenna was connected to the module in an open environment. The current host platform under application uses an antenna of the same type but of lower gain and is installed inside the host platform enclosure. The physical restraints introduced by the host platform should have resulted in equal or lower level of radiated emission. Therefore, additional Radiated emission testing is not necessary. Software security remains unchanged from the original application. Antenna Specification 1. Antenna Type : Chip Antenna 2. Antenna Gain : 2.5 dBi 3. Manufacturer ans Model : ACX / AT8010 Series Except for the change above, the design, hardware and implementation are exactly same with original. If you have any questions regarding this application, please feel free to contact me. Sincerely, ChiWon, Song/ Team Manager SMARTSOUND CORPORATION