Logitech Trackman Marble T-BC21 USB Wired Trackball Mouse Tested MISSING BALL

Authentic Logitech Trackman Marble amofferextrous USB wired optical trackball mouse (Model: T-BC21). Designed with an ergonomic, sculpted amofferextrous shape that delivers all-day comfort for both right- and left-handed users. Features Logitech\'s patented Marble optical sensor technology for smooth, precise tracking, customizable 4-button fingertip control, and plug-and-play USB connectivity. Fully bench-inspected: USB registers properly, all four microswitch buttons actuate crisply, and the internal sensor lens and ball bearing supports are clean and unmarred. Outer shell shows light cosmetic surface scuffs from prior gentle desktop use. Critical Note: Red trackball marble sphere, driver disc, and original retail packaging are NOT included; trackball mouse body only. Requires a standard compatible 40mm marble to operate.

Product Specifications & Details
• Brand: Logitech (100% Genuine OEM Authentic)
• Model / MPN: Trackman Marble (Model: T-BC21 / P/N: 804360-0000)
• Device Type: Ergonomic Amofferextrous Optical Trackball Mouse
• Tracking Technology: Optical Marble Sensing Technology
• Number of Buttons: 4 Tactile Buttons (Left, Right & Dual Small Function Buttons)
• Orientation: Symmetrical Amofferextrous Design (Right or Left Hand)
• Connectivity: Wired USB (Integrated Cable)
• Colorway: Metallic Dark Gray / Charcoal
• Country of Manufacture: China
• Operational Status: Fully Bench-Inspected, Buttons & Sensor Tested (Missing Ball)

Item Measurements (Approximate Physical Dimensions)
• Length: approx. 6.5 in (16.5 cm)
• Width: approx. 3.5 in (8.9 cm)
• Height: approx. 1.75 in (4.4 cm)
• Cable Length: approx. 6 ft (1.8 m)
• Bare Mouse Weight: approx. 5.8 oz (164 g)

Condition & Functional Notes
• Pre-owned desktop pointing device; fully bench-inspected.
• All four click buttons actuate with clean tactile response.
• Internal optical eye and bearing contact points are clean.
• USB cord insulation is intact with no fraying or splits.
• Plastic casing shows light cosmetic marks from normal office use.
• Stored in a clean, smoke-free environment.

What\'s Included
• 1x Logitech Trackman Marble USB Wired Trackball Mouse Body (T-BC21)
(Important: Red trackball sphere, software, and photo staging props are NOT included)

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