This is the high-performance trackball mouse "MX ERGO" from Logicool (Logitech). It reduces strain on the wrist, allowing for comfortable use even during long hours of work. ・Connection method: Bluetooth / Unifying receiver (Logi Bolt not supported) ・Features: Can switch between two PCs (Easy-Switch compatible) ・Includes an angle adjustment plate, allowing for adjustment to a natural wrist angle ・Button customization possible (Logicool Options compatible) 【Condition】 ・Operation confirmed ・Minor scratches from use, but no issues with operation ・All included accessories are shown in the images Thank you.