The product description states: 'The WLAN box extends the WLAN of your Internet box, Internet box standard or Internet box plus and has various areas of use: wireless connection between TV box and Internet box, WLAN repeater or WLAN access point. It automatically connects your devices to the best available WLAN. If the existing WLAN is not sufficient, the WLAN box extends the WLAN of the Internet-Box, the Internet-Box standard or the Internet-Box plus and thus enables a better range and higher WLAN speed.'
This works perfectly in our house together with the Swisscom Internet-Box. Unpack the device and put it into operation with the help of the enclosed instructions, voila ...

Plug it in, configure it via the Home app and you're done - it's a brilliant device. Have 2.

When the WLAN box is initialised as described, it takes over all WLAN settings of the router. The WLAN Box can then be placed anywhere. Mesh function is set automatically