1??FREE SETUP: USB shift knob can be used as a switch for fast switching between high and low gears and includes two switches for up to 18 gears and a custom setting button that can be set freely. 2??SCOPE OF APPLICATION: USB gearshift shifter knob for ETS2 and for ATS games. Suitable for Logitech G29 27 25 920 923 and for Thrustmaster TH8A. 3??PLUG AND PLAY: USB gearshift knob is plug and play and easy to install. Please plug the USB shift knob into your computer's USB port, not into the steering wheel. 4??COMFORTABLE GRIP: USB racing shifter knob features a specially designed rough surface for a comfortable grip and less slippage when in use, making your racing ride safer. 5??ADDS REALISM: The switches feel solid, switch quickly between high and low gears, and make a pleasant "click" sound when they are in place. Adds a lot of realism to the truck sim.