We appreciate you contacting us about plugging your stereo headset into the Nokia HS-12W wireless headset. We can provide the following information.
We are unclear about the Nokia HS-12W wireless headset. Please check and confirm the model number you were given for the Nokia wireless headset.
Regardless of the model number for the Nokia wireless headset, we can tell you that none of the Nokia wireless headsets have a plug for another headset to be connected to them. They are the headset.
If you have any additional questions, please contact us. To ensure proper handling, please continue to use the current subject line.
Thank you for choosing Nokia for your mobile needs.
John E-mail Specialist Nokia Inc. =================================================================