Plug
| Pin | Signal | Description |
| 1 (Tip) | Left ear | White |
| 2 (Ring 1) | Right ear | Red |
| 3 (Ring 2) | Mic/Switch 1 (Answer Call) | Blue |
| 4 (Sleeve) | Ground | Copper |
| not drawn (Outer Sleeve Ring) | Switch 2 (End Call) |
| Pin | Signal | Description |
| 1 (Tip) | Left ear | White |
| 2 (Ring 1) | Right ear | Red |
| 3 (Ring 2) | Mic/Switch 1 (Answer Call) | Blue |
| 4 (Sleeve) | Ground | Copper |
| not drawn (Outer Sleeve Ring) | Switch 2 (End Call) |