person holding knob, black equipment knob, oscilloscope, studio setting, hand adjusting knob, detailed view, electronic device, technical equipment, close-up shot, studio photography, equipment control, 480x800px, Free download

person holding knob, black equipment knob, oscilloscope, studio setting, hand adjusting knob, detailed view, electronic device, technical equipment, close-up shot, studio photography, equipment control
person holding knob, black equipment knob, oscilloscope, studio setting, hand adjusting knob, detailed view, electronic device, technical equipment, close-up shot, studio photography, equipment control
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