4ms MetaButtons

No updatable firmware on the 4ms MetaButtons

It is analog or fixed-function hardware, so there is nothing to update.

You can still add it to your rig to keep an inventory and track its used market price.

MetaButtons is a passive expander for the 4ms MetaModule and has no independent firmware. Its functionality is part of MetaModule firmware. Update the MetaModule via Main Menu → Settings → Update using a USB drive or microSD card.