Happy Hacking Keyboard Features by model Features by model

| Model_Name | Model_ | Color | Switch_Type | Interface | Blank_Keytops | Introduced |
|---|---|---|---|---|---|---|
| Happy Hacking Keyboard Professional JP | PD-KB420W | White | Capacitive | USB | No | Nov 10, 2008 |
| Happy Hacking Keyboard Professional JP | PD-KB420B | Charcoal Gray | Capacitive | USB | No | Nov 10, 2008 |
| Happy Hacking Keyboard Professional HG | PD-KB500W | White | Capacitive | USB | No | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG | PD-KB500B | Black | Capacitive | USB | No | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG | PD-KB500WN | White | Capacitive | USB | Yes | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG | PD-KB500BN | Black | Capacitive | USB | Yes | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG JAPAN | PD-KB500J | Wajima-style lacquer | Capacitive | USB | Yes | Oct 12, 2006 |
| Happy Hacking Keyboard Professional 2 Type-S | PD-KB400WS | White | Capacitive | USB | No | June 29, 2011 |