Course Recorder

[@satbirrrr]

Thanks for the video keep uploading I subscribed

[@olegsoya8814]

Thank you for video. Very help me.

[@darkomiljkovic19761]

Any information about how to reduce noise ?

[@dimikast1]

As per maker's manual the paper must pass under the roller with the three o-rings.

[@papaninotv2799]

Hi can you please tell me what is the function of all the buttons of the Paper recording echo sounder