1. Compatible With Modified G923/ G25 / G27 / G29 Manual Gear/Thrustmaster TH8A Gear / FANATEC SQ PXN A10 Gear Manual Shifter.Only Applied to ETS2& ATS games. 2. Flexible High and Low Gear Switching;The Gearshift high and low gear handball head, can be used as a switch to quickly switch between high and low gears, including two switchers, up to 18 gears and a custom setting button for free setting. 3. Widely Applicable for shifter models The 11.5mm adapter plug have been plugged in ---- Use hexagon screw fit for different brand models,Such as For Logitech G25/G27/G29/G920;For THRUSTMASTER TH8A;For FANATEC SQ ;For PXN A10 Shifter...so on other brands shifter diameter less than 11.5mm can fit for it. 4. USB Plug and Play Independent USB cable, plug and play, easy to install. The Gearshift Knob is recommended to be plugged into the USB port on the PC,not recommended to be plugged into steering wheel.only supports PC windows system.Support win7 win10 and above PC system. Features: Real driver ball, excellent feel and quality Plug and play,easy to install,drive-free use, only supports PC windows system with windows7 and above systems. High and low gear handball head, suitable for players who modify G25 / G27 / G29H/ TH8A gear ETS2 & ATS. Including: two switchers, one additional user-defined button,Can use the switch to quickly switch between high and low gears, up to 18 gears. The connector is made of aluminum alloy processing, compatible with all mainstream electronic gears on the market, compatible with 12mm, 10mm, 8mm connections, such as compatible (Logitech, Thrustmaster, SQ, Kraton,Laishi,equipment, etc.) Colour:Black Material:plastic+metal Package Contents: 1 x USB Shifter Knob kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.