... been prefabricated K0.8, K1.0(200 indicate sound course, others like this), K1.5, K2.5 ... the instrument simultaneously records B image. Press certain button, the mode will expediently change to Mode B, ... mentioned information is recorded by the outset USB, satisfying the recording needs of more than 30 days.The ... flaw wave’s level, up straightness and the sound course, which is convenient to detect. 8. ...