Brand: BTC (Behavior Tech Computer Corp.)

Model: BTC-5100 Series

FCC ID: E5X5R5BTC-5100

Serial / QC Number: 749135079 (U.S. QC-PASS 5100 2.0 PS2)

Connector: Standard 5-Pin DIN (PC/AT)

Colorway: Black case with two-tone black and dark grey keycaps

Origin: Made in Taiwan R.O.C.

Item Details & Operational Condition:

• Fully Tested & Working: Connected to a vintage PC test bench and verified operational. All alphanumeric keys, modifiers, function keys (F1–F10, F11/F12 via Fn), navigation cluster, and integrated number pad register accurately.

• Status Indicators: LED indicator lights (Num Lock, Caps Lock, Scroll Lock) illuminate properly.

• Switch Mechanism: BTC dome with slider ("rubber foam" / tactile capacitive-feel dome), famous among retro keyboard enthusiasts for its tactile, smooth keystroke and mechanical feel.

• Cable: Factory coiled black cable terminating in an intact 5-pin DIN connector with clean pins and tight rubber strain relief.

Cosmetic Condition:

• Overall Condition: Excellent vintage cosmetic condition with minimal, light signs of previous use.

• Keycaps are clean, textured, and free of shine, with sharp factory pad printing/legends throughout.

• Case shows no cracks, deep gouges, or structural defects. Rear model label and QC inspection sticker are fully intact.

• Please review all photos for exact condition and aesthetic details.

Features & Layout:

• Compact Footprint: Space-saving 75% compact mini form factor, ideal for tight desks, retro rack setups, or vintage cyberdeck and portable PC builds.

• Layout: Compact layout featuring dedicated inverted-T arrow keys, top-row function keys, side modifiers, and blue secondary legends accessible via the dedicated Fn key.

• System Compatibility: Native AT 5-pin DIN connection; fully compatible with IBM PC/XT/AT architectures, 286/386/486/Pentium motherboards, and easily adaptable to PS/2 or USB using passive/active DIN-to-PS2/USB adapters.

What’s Included:

• Authentic BTC 5100 Compact Mini Keyboard (attached 5-Pin DIN coiled cable)