I am new. I registered to ask this question. What drum machine can I buy to wear around my neck as a stand-up solo singer. I want to set the beat and then drum around it.

Background. I am basically an a capella singer, doing old time, folk, and gospel. I sometimes set the beat with an array of traditional percussions: washboard, tamborine, maracas, guiro. But I mainly pound my body in different places with different hand techniques (flat, cupped) to make different sounds. This was -- still is I guess -- called hambone. By the end of the night, it is hard on my hands and hard on the 5 body places that I mostly slap on. I am getting too old for this. I have seen a you-tube clip of Jonathan Coulter in concert with a drum machine hanging around his neck. What is that? How much does such a thing cost?