Balance 20W Firmware

Hello, Is there a newer firmware for the Balance 20W? I am currently running v4.8.1 build 1027.
The device can’t pull a new one, and support site does not explicitly show the 20W. Firmware version 5 for the 20 series does not load either.

Thanks.

v4.8.1 is the latest firmware for Balance 20W. This model is obsoleted. Please consider to refresh your router. You may refer to the URL link below for the model comparison.

Thanks @TK_Liew for the quick response, much appreciated.