Many professionals are still using this unit, and it has an "autosensor" that will allow one to concentrate in insertions, and the machine will fire off the treatment energy one to three seconds after you have made your insertion. That is more than enough time to get the probe properly positioned.
A home user would be ok with this unit with some information and instruction.
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Setting a goal is not the main thing. It is deciding how you will go about achieving it and staying with that plan. --- Tom Landry