The 82-350-10 is a lightable gray modular keyboard module featuring 3 single-pole single-throw (SPST) buttons with a slot for insertable legend inserts, enabling custom labeling of keys. The module maintains a standard button center spacing of 11/16" and is designed to stack with other modules in any configuration while preserving consistent button distances. It accommodates T-1 incandescent lamps with options for bright (0.15 MSCP at 5V, 115 mA) or moderate (0.03 MSCP at 5V, 60 mA) illumination, with service lives up to 100,000 hours. The module operates reliably across -40°C to 80°C and features gold-plated brass pin contacts with a contact resistance of 25 milliohms or less, supporting 1,000,000 operations with minimal contact bounce. This configuration is ideal for applications requiring customizable, illuminated control panels in telecommunications, industrial equipment, and medical devices where professional appearance and user-defined labeling are essential.