Virtually no effect

nice design, complex-sounding structure, several functions useful description _ but practically ineffective. is quasi plugged into the headphone cable. The sound experience is, however, not affected audible to me. That at all electronics are built, and the lead is not simply looped through, it can be assumed da LEDs states (to), and the routing of the audio signal does not occur when the battery is exhausted; meanwhile in less than 2 hours.
So gain no speech, sound interference inaudible, battery life is a joke. Conclusion: annoying but return failed.