1 | Tip |
Audio In Left |
Red |
2 | R2 |
Audio In Right |
Green |
3 | R3 |
Audio Ground |
Blue |
4 | Sleeve |
Microphone Out |
Yellow |
see also http://pinoutguide.com/PDA/htc_hd2_headphone_pinout.shtml
The unit also has a standard micro-USB connector which is used for recharching the internal battery, input is 5V , exact current unknown but is less than 500ma so that it can be recharged from a PC
.