#     [  Archive  PR621 → MCT66EM-IO v1.1.0.303](https://www.roger.pl/en/support/technical-support/download/firmware/2158-pr621-mct66em-io-v1-1-0-303)

 [  Download  (zip, 40 KB) ](https://www.roger.pl/en/support/technical-support/download/firmware/2158-pr621-mct66em-io-v1-1-0-303/file)