Ergonomic Design Wired Ergonomic Trackball - Brand: SANWA SUPPLY - Model Number: MA-TB177BK - Shape that reduces strain on the wrist and elbow. - Type: Wired trackball Thumb-operated trackball - Operates a 34mm diameter medium-sized ball with the thumb - Enables precise cursor control - Ergonomic design: 60-degree tilt - Number of buttons: 5 buttons - Sensor resolution: 3,000 DPI - Wired connection (USB A) - No batteries required for a stable connection - Cursor speed adjustment 4-step switching between 400, 800, 1200, and 1600 counts/inch - Supported OS Compatible with Windows 11/10/8.1/8, macOS (10.13 or later), and Chrome OS - Cable length is approximately 1.5m - Size: W86.2 x D136.8 x H67.6mm - Weight: Approximately 159.6g Unopened. With a natural grip that supports the hand from the side, it is easy to use for long periods of time. Recommended for those who want to reduce wrist strain. [Included Items] - All items shown in the image. [Notes] - We will strive for a courteous transaction. - Yu-Yu Mercari Delivery Thank you for viewing.