Flow of WLAN Connection Kit?

Good morning,

On the [Swisscom] website (https://www.swisscom.ch/fr/clients-prives/aide/peripheriques/reseau-a-domicile/wlan-connection-kit.html) I see that the WLAN Connection Kit uses the protocol 802.11ac which in principle does not go higher than 1300Mbps (if all goes well). Off this page, Swisscom announces that their product can reach 1700Mbps. I’m missing something. How can Swisscom reach 1700Mbps with the kit if the 802.11ac protocol does not go higher than 1300Mbps?

Thanks in advance

Show original language (French)