We are convinced of the reliability of our equipment. Nevertheless, defects can occur for a variety of reasons. We check the functionality of devices and accessories for you.

If your request is not a warranty case (e.g. because the warranty period has expired), you can buy our service OKM Device Check.

If your request is a guarantee/warranty case or you are not sure about it, please contact us via e-mail or use our contact form below: For faster processing, please fill in the RMA form (PDF, 64 KB) and attach it together with your proof of purchase (invoice) to your request.