BlankHello, Tom, and all. I figured I would contribute a little here, the TS-440 was one of the first computer interfacing radio's that Kenwood built. The 440 uses the VS-1, the 450uses the VS-2. In response to an earlier post about the TS-450, the reason these rigs are still worth so much is they are like tanks, easly repairable for not much investment. If I were looking for the ATUnit for the 450 I would check on Ebay, as for the VS-2 I think there is already a link on the page for the PEAKs Company. 73, Brian McFadden, KD8ASE Date: Fri, 25 Sep 2015 22:12:18 -0700 From: Tom Fowle <[log in to unmask]> Subject: Re: Fw: [Kenwood] FS: Kenwood TS440S Take care, I believe the TS440 does NOT accept the voice module but the TS450 does. Hope I'm wrong but check first. Tom Fowle WA6IVG --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com