About inexpensive devices available in the market.... ( Multiple responses)
Because devices create an electrical arc of some sort, this makes them fit for purpose.
In most cases about inexpensive devices- It is difficult to assess their design and quality assurance because there is no even manufacturer name on the packaging.
Some companies in the EU buy these devices from China, provide some sort of training and sell them at a profit
Are these cheap devices fit for purpose? ( Multiple correct)
We cannot help you in these cases ( Multiple correct)
How can we help you? (Multiple answers)