This is a tilt stand Ver2 for the Logitech trackball mouse ERGO M575. You can adjust the angle by combining the 15-degree main body with 10, 15, and 20-degree parts. This listing includes the stand body (15 degrees) and a set of tilt parts (10, 15, and 20 degrees), color: black. Ver2 adds a lever so you can switch between Bluetooth and USB using the button on the back of the M575 while holding the mouse. Two levers, large and small, are included, so please attach the one that is easier for you to use. The M575SP, which was released in September 2024 and features noise reduction and BOLT compatibility, has the same shape, so the stand can be attached. The original M575 can switch between Bluetooth and USB with one click, but the BOLT version of the M575SP has a different specification for the Bt/USB switch button, requiring a long press of the button and re-pairing. Switching between BT/USB is easier with the original M575. The stand body is fixed by hooking a nail behind the battery cover and pushing it into the ball hole. The dongle and battery cover can be stored in the main body. The main body and tilt parts slide and lock together. Rubber non-slip pads are attached to the back of the main body and tilt parts for grip. The tilt is designed with the base of the little finger as the axis to prevent the wrist from lifting as much as possible. The tilt parts for the M575 and M570, which are sold separately, share the same joint and can be used together, but the position of the holes on the back is different, so the switch cannot be operated. ＜Reference: M575 Stand Ver2 Introduction Video＞ https://youtu.be/ZXixy01VsZs ＜Supplement＞ Due to being manufactured with a layered 3D printer, there are unique layer marks. If the item is out of stock, it may take some time to ship. As this is a handmade item, there may be individual differences, and there may be traces of adjustment with sandpaper, a knife, or a lighter. The mouse shown in the photos is not included in the product. The detailed specifications may differ from the photos. The color of the materials (filament) used may vary depending on the time, so the color may differ from the photos. I will check and adjust with the mouse I have, but the feel may vary depending on the individual differences of the mouse body. Please understand.