Razer Turret – Disable lighting without computer/app?

Hi all, I recently purchased this fantastic product for use with my SteamDeck. I don't have a computer (Windows/Mac) and only a mobile phone, leading me to point out the dependency of the Synapse software has put me in a bind. I want to keep this keyboard+mouse combination, but I can't for the life of me understand how I can disable all lightning on both devices. It appears that if the software isn't running, the device default colors, which makes me quite nauseous. I tried to use a friends computer to set an "on-board" profile for the mouse, but when I switch to it (without using the computer I created the profile on), it doesn't actually change to what is set (no lights). The keyboard has no on-board memory that I can figure out, but the only way I figured out a way here to turn the lights off is use the Fn+F11 to turn the brightness down. Without a computer or the Xbox One software running, is there a built-in hotkey on razer products to disable lighting completely? Or is there an actual dependency for running the software to have the lighting disabled for both the keyboard+mouse?