Logitech Trackman Marble Amofferextrous Wired USB Optical Trackball Mouse (Model T-BC21, P/N 810-000767) (Brand: Logitech; Model: Trackman Marble; Model Number: T-BC21; Part Number: 810-000767; Tracking: Marble Optical Technology; Interface: Wired USB Type-A; Hand Orientation: Amofferextrous; Colorway: Metallic Silver-Gray with Signature Red Ball; Origin: Made in China). Renowned for its comfortable contoured profile and wrist-relieving ergonomics, the Trackman Marble allows precise fingertip control using a smooth red optical trackball, large primary click buttons, and convenient secondary forward/backward navigation buttons. Pre-owned condition (clean, structurally sound, and bench-tested: plug-and-play USB connection detects immediately; optical sensor tracks cleanly with zero cursor jitter; large red marble rotates fluidly on smooth ball bearings; all four tactile microswitch buttons actuate with crisp tactile response; cosmetic wear disclosure: contoured gray casing, underside rubber foot pads, and red marble ball display light normal cosmetic surface scuffs, minor hairline scratches, and gentle desk handling wear consistent with prior use as photographed in Photos 1–5; package disclosure: this listing is for the authentic Logitech Trackman Marble mouse ONLY; original retail box, driver software CD, and photo staging props are NOT included; sanitized, contact bearings cleaned, and stored in a clean, climate-controlled, smoke-free environment).
Product Specifications & Details
• Brand: Logitech
• Model / Series: Trackman Marble
• Regulatory Model (M/N): T-BC21
• Part Number (P/N): 810-000767
• Tracking Technology: Patented Optical Marble Sensing (300 DPI)
• Connectivity: Integrated Wired USB Type-A Cable
• Button Layout: 4 Tactile Buttons (Left, Right, Forward & Back)
• Ergonomics: Sculpted Symmetrical Amofferextrous Design (Left or Right Hand)
• Operating System Compatibility: Windows & macOS (Plug and Play)
Dimensions & Measurements (Approximate)
• Length: approx. 6.5 in (16.5 cm)
• Width: approx. 3.4 in (8.6 cm)
• Height: approx. 1.7 in (4.3 cm)
• Cable Length: approx. 5.7 ft (1.7 m)
• Net Weight: approx. 7.0 oz (198 g)
What's Included
• 1x Logitech Trackman Marble Wired USB Trackball Mouse (Tested)
(Important: Driver CD, user manuals, and photo staging backgrounds are NOT included)
Condition & Testing Notes
• Pre-owned condition; fully bench-tested and operational.
• Tracking & Switches: Smooth red ball rotation, clean optical sensor, and snappy buttons.
• Cosmetics: Light normal cosmetic desk scuffs and wear as pictured.
• Sanitized, wiped down, and stored in a clean, smoke-free environment.
SKU: 14
