One panel. Everything you need for your sim headset.
The USB2x Toolbar sits on your desktop and gives you one-click access to the features pilots ask for most: sidetone, VOX, squelch, and independent input and output levels. Built for the 9er Systems USB2GA and USB2Lemo adapters.
Enable sidetone in one tap
Turn sidetone on or off in a single click.
Smart VOX — voice activated
Sidetone follows your voice, with adjustable squelch so the headset stays silent until you speak.
Sidetone volume control
Fine-tune how loud your own voice sounds. (Windows)
Separate mic & speaker volume
Adjust microphone and speaker levels independently — right from your computer's toolbar.
Same app on both platforms
The USB2x Toolbar runs natively on macOS (Apple Silicon and Intel) and Windows 10 / 11. Detects your 9er Systems adapter automatically. Set it to load at startup and it will be waiting for you whenever you fire up the sim.
Get the free toolbar
Products sold before May 1, 2026 may not be compatible with sidetone support.