Also note that if you buy a Tin Can unit, there's a noncompete clause: You agree not to "build, benchmark, or develop a competing product or service." So don't buy this if you work for a telco, or a voice communications service of any kind.
I literally LOLed at the idea that purchasing a consumer product, at retail, could include stipulations on my future employment. And at the hubris of any manufacturer for imagining they could get away with such an absurd idea.