This is an older- generation stereo headset from Cyber Acoustics, model
AC-200. This came in a box of 50 to a corporate IT department, so has no
original retail packaging, but does not appear to have been deployed since its
receipt. Untested, but no reason to suspect they won't work. That being said,
sold as is, no returns accepted.
If you buy multiple units, please wait until you receive an invoice from me
with combined shipping for an accurate final price.