H-its Kabel RJ9 / RJ10 to 3.5mm Smartphone PC Headset Telephone Phone Adapter Cable Lead Cord Converter Jack for Cisco IP Office Desk Phones [ HK eCART] 1 m LAN Cable(Compatible with Telephone, Black)
DC Pro Audio 3.5mm TRRS Jack to RJ9/RJ10 iPhone Headset to Cisco Office Phone Adapter Cable. 3.5mm TRRS Female to 4P4C Male Plug. Convert 3.5mm plug to 4P4C RJ9/RJ10 headset plug, you can use your own headphone to chat on telephone with this cable. Due to power and impedance general computer headset is relatively low, compared to the effect of professional telephone headset there is a gap, the pursuit of high-quality effects pro professional products recommended to choose better Since the phone is not unified production standards, this product is not available for all brands phone (compatible with about 90% telephone)