Headset Adapter Extension Cord Universal Female RJ9 Adapter to USB

The universal RJ9 adapter cord to USB provides a cost effective solution for people using both desk phones and computers. Now, with the universal F080U cord, it could let the different wiring RJ9 modular headset work with computers well, reducing cost and bringing greater convenience. Simply connect the adapter and the headset through the RJ9 female jack and USB plug and slide the switch from one position to the next until a dial tone is heard.