Bought this unit for use while driving my M35A2. I modified a couple pairs of Peltor ear muffs to fit the speaker and mic portion. Good fit.True, this device is poor quality (crap quality), one has to be patient with it since it will not tolerate ANY abuse.Either way, it works for my intended use and it's a lot cheaper than the alternative $800 intercom system from Peltor.You be the judge; $65 vrs $800. If you have lots of extra money, don't waste your time. If you don't, then put up with a delicate piece of junk. Its working for me.Additionally, if you intend to use the metal belt clip on the back, buy some super glue before using it.