Computer Station Nation is reader-supported.
When you buy through links on our site, we may earn an affiliate commission. Learn more.
This is the full manufacturer specification sheet for the HHKB Professional Classic Charcoal, sourced from PFU America’s official product page and confirmed against the box documentation. If you’re cross-shopping against the Type-S or HYBRID variants, the dimensions and weight are identical — only the switch behavior, the connection options, and the silencing rings change.
Happy Hacking Keyboard Professional Classic (Wired, USB, Mac, Windows, Charcoal, Printed) with 2 Year Advance Exchange Warranty CG01000-296401
Switch Specifications
| Switch Type | Topre electrostatic capacitive |
| Actuation Force | 45 grams |
| Travel | 4.0 mm total, ~3.0 mm to actuation |
| Silencing | None — unsilenced (louder thock) |
| Rated Lifespan | 50 million keystrokes |
| Anti-Ghosting | NKRO over USB |
Physical Dimensions
| Width | 294 mm |
| Depth | 120 mm |
| Height | 40 mm |
| Weight | 540 g |
| Tilt | 6 degrees (fixed, no flip-out feet) |
Keycap Details
| Material | Dye-sublimated PBT plastic |
| Profile | Cylindrical (HHKB original) |
| Thickness | 1.5 mm |
| Legend Style | Sun Type 3 layout, top-printed |
| Color | Charcoal grey with light grey legends |
| Total Keys | 66 |
Connectivity
| Connection | USB-C wired only |
| Cable | Not included (BYO USB-C to USB-A or C) |
| Polling Rate | 1000 Hz |
| Latency | ~1 ms wired |
| OS Compatibility | Windows 10/11, macOS, Linux, BSD |
DIP Switch Modes
HHKB ships with six DIP switches on the underside that toggle layout behavior without software. Combinations let you swap between HHKB mode, Mac mode, Windows mode, Lite Ext mode, and Esc/Tab/Diamond key remaps. This is the original Sun-workstation-style programmability and it still works on every modern OS.
In the Box
- HHKB Professional Classic Charcoal keyboard
- Quick start guide
- Warranty card (2-year limited)
For a deep typing-feel review and comparison against the Type-S and HYBRID variants, see our full HHKB Professional Classic Charcoal review.
Source: HHKB Professional Classic official product page
