Muscle hypertonicity: Muscle hypertonicity is a condition in which a muscle's tone is abnormally tight or taut.
I've personally tried creating a few cardboard ones myself (a cardboard radionic box can work as effectively as a $300 store-bought machine) and using radionic software. From experience, it's hit-miss thing. Radionic devices DO work and they work WELL if and only if you can pour laser-like concentration in the few minutes you use it. After that, you can let the machine do the job without a thought on it. If you use a radionic device in a doubtful state, you can expect failure because you pour in negative energies that run counter to your desire. Of the two forms of radionic devices (the physical boxes and the software programs), I'd nod my head to the software flavors. They are far more versatile in that they allow you to suffuse pictures, words, symbols and rates into one coherent session. CyberShaman is one such software.
If you don't have a voltmeter, you can get a basic one at Radio Shack for less than $10, and you will probably find other uses for it in the future. Just set the voltmeter to read DC volts, plug in the supply, and touch the wires (or the two conductors of the DC plug) with the two voltmeter probes. If you get a positive reading on the voltmeter, the conductor to which you touch the red probe is the positive.