SinLoon Telephone RJ9 4P4C Splitter Adapter Cable RJ9 Headset Extension Cord Adapter 1 Male to 2 Double Female Connector for Hot Desking Office Phones Handset Splitter (2 RJ9 FM)

The plug on the cable is 4P4C,Complete with RJ9/RJ12 plug
Great use for Telephone RJ9 4P4C Training Adapter Y Splitter for Headset or Handset splitter for office phones,call center / telephone marketing training;Easy setup, plug and play.
Incoming calls outside the phone, two all the phones ring, and any call can be made to talk to the outside；When you need to make a call, you can use any of the two phones.
The rj9 RJ9 Telephone Training Splitter Adapter for Nortel Meridican, Norstar, Avaya, Ashtra, Mitel, Polycom, Ge and Other Ip Phone
the adapter cable length：0.5M（20inch)