I am selling this lightly used (2 years old) system consisting of two units with headsets and chargers, in a protective storage case. The batteries are rechargeable. Regular price new is $300. I will let them go for half price at $150.
I charge them prior to use and they work fine. I don't know how long they hold the charge because I didn't use them very long, only long enough to dock. There are clips on the units that can attach to a pocket, although not really thick enough to attach to a belt.