Shenzhen Zenithink Technologies MID ZT280-C91 FCC ID ZAXZT280-C91
The remaining characters of the FCC ID, ZT280-C91, are often associated with the product model, but they can be random. These letters are chosen by the applicant. In addition to the application, the FCC also publishes internal images, external images, user manuals, and test results for wireless devices. They can be under the "exhibits" tab below.