There are also some DIY versions of this, often in the form of ankle bracelets. Lehpt Anonym, a 'biohacker' even planned to implant a similar device in their l

There are also some DIY versions of this, often in the form of ankle bracelets. Lehpt Anonym, a 'biohacker' even planned to implant a similar device in their leg[1], though I don't know if they succeeded. [1] https://www.wired.com/2010/12/transcending-the-human-diy-style/ https://www.wired.com/2010/12/transcending-the-human-diy-sty...