<https://forums.sonyinsider.com/topic/20277-rh1-or-rh10m100/#comment-137378>
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"The RH10 is discontinued so it's pretty hard to find lately unless you eBay it. And, there's big differences between the RH1 and M100. Edit: It's the M200 and RH1 that are the same, except the M200 comes with a mic.  I'll let others highlight the pros and cons of each, but here's some background information for you.  RH10/M100 RH910/M10 RH1  Welcome to MDCF and good luck! \n"
<https://forums.sonyinsider.com/topic/20277-rh1-or-rh10m100/?tab=comments#comment-137433>