They are an AM/FM 10 meter radio packed into part of the mic and also a head unit I beleive. Here are the specs direct from strkyer themselves. How well they perform, I am not sure of. Never even heard one on air to be quite honest. I tnink a couple of members either have them or had them, and nothing impressive that I can remeber about them other than being a bit more compact. But heck it's only an AM/FM radio. No SSB. Not for me. If it had SSB then I might look twice. Is space an issue as to why you want this radio?? If not, get the 955hp. Then you can at least use another mode of operation. JMHO. And also, the head unit will need to have good air flow I would think as it most likely gets hot, or pretty warm. Might think about a fan right off the get go if it doesn't have one. I'll let someone who has one speak more on it. But the specs are below. Nothing really special about it other than it being a mic display remote head unit. JMHO.