Happy Hacking Keyboard Features by model Features by model

| Model_Name | Model_ | Color | Switch_Type | Interface | Blank_Keytops | Introduced |
|---|---|---|---|---|---|---|
| Happy Hacking Keyboard Professional | PD-KB300 | White | Capacitive | USB | No | Apr 24, 2003 |
| Happy Hacking Keyboard Professional | PD-KB300B | Charcoal Gray | Capacitive | USB | No | Apr 24, 2003 |
| Happy Hacking Keyboard Professional | PD-KB300NL | White | Capacitive | USB | Yes | Apr 24, 2003 |
| Happy Hacking Keyboard Professional | PD-KB300BN | Charcoal Gray | Capacitive | USB | Yes | Apr 24, 2003 |
| Happy Hacking Keyboard Professional 2 | PD-KB400W | White | Capacitive | USB | No | Mar 24, 2006 |
| Happy Hacking Keyboard Professional 2 | PD-KB400B | Charcoal Gray | Capacitive | USB | No | Mar 24, 2006 |
| Happy Hacking Keyboard Professional 2 | PD-KB400WN | White | Capacitive | USB | Yes | Mar 24, 2006 |
| Happy Hacking Keyboard Professional 2 | PD-KB400BN | Charcoal Gray | Capacitive | USB | Yes | Mar 24, 2006 |