The Btech BT27 is a scart switch box that features 2 scart + S-VHS inputs to scart and S-VHS output. RGB compatible.
This will allow you to control which input you would like to see/hear.
Printed on 25th Jun 2022. Please see https://www.sarabec.com/scart-control-box-p181/ for the latest version and links to any instructions for this product.