This headset was previously used by the Onalaska Fire Department in Wisconsin. The tabs that hold the neckband to the ear muffs were damaged and I was able to modify the headsets so they work as previously designed. Please take that into consideration when purchasing. This unit has been tested and shown to work properly though. It was tested with the Peltor 5018 PTT (I have a postings for as well) and a Motorola XTS1500 radio. Both the speakers in the ear muffs and the boom microphone work great. Please see photos. The boom mic attachment piece was broken and I was able to fix it as seen in pictures. Also the housing surrounding one of the earmuffs was cracked. This does not affect the usage of the headset. If you would like more pictures please reach out and I can assist with that process. I ship via USPS and do have multiple headset available. If interested, please send me a message. I do not take returns, so be sure you are happy with what you are buying. 

Description from website:

3M Peltor 2-way Communication Headsets are designed for industrial users working in high noise environments. They offer versatility along with the protection, durability and comfort that you expect from a worldwide leader in communication headsets. These behind-the-neck headsets feature:
  • Soft foam ear cushions
  • Noise canceling boom microphone
  • Deep earcup design for extended comfort
  • Push-to-talk adaptor required
  • Possible industries or applications include: heavy equipment operators, airport workers, construction, manufacturing, agricultural, and racing
  • For Motorola Neckband Model GP300, GTX, P1225, P1225LS, LTS2000, SP50, P110, CT150/250/450/450-LS, CP100 Behind the neck
  • NRR 24 dB**The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.3M is Leading the Advancement of Hearing Conservation.