Hi, How far away between the adapter and your router now? Can you see the router's 2.4GHz WiFi on your other devices? Please try to change the router's 2.4GHz wireless channel to 1 or 6 or 11, then...

This adapter support 802.11ac, please check the specification on the official website below. https://www.tp-link.com/en/products/details/cat-11_Archer-T2U.html#specifications Please try to reinstall...

Hi, 170407 is the latest firmware for TL-WPA8730, your firmware version is the latest.

For the Range Extender product, you can give it a different network name, but not the password, the password must be the same as the router.

If the extender not broadcasting the 5G wifi, we suggest you move it close to the router, it it still the same, factory reset(by press the reset button for 8 seconds) it, and reinstall it agian, then...

Please try to factory reset the extender by press the reset button on the back for 8-10 seconds agian, you will see the screens changes when you do that. After reset, please connect to the extender's...