In the documentation there is only a layout for 16 chanhels: https://www.greenteksensor.com/wp-content/uploads/CustomUpload/GT%20Cap%20Gelfree-S3/Electrode%20Layout%20of%20GT%20Cap%20Gelfree-S3.pdf
In the documentation there is only a layout for 16 chanhels: https://www.greenteksensor.com/wp-content/uploads/CustomUpload/GT%20Cap%20Gelfree-S3/Electrode%20Layout%20of%20GT%20Cap%20Gelfree-S3.pdf