.zwei-bg-images {
    background-image: 
        url(https://webers-testseite.de/wp-content/uploads/layerslider/projects/Landing-Page/headphone-compressor.png), 
        url(https://webers-testseite.de/wp-content/uploads/kachel-1.jpg);
    background-repeat: no-repeat, repeat;
    background-position: right bottom, top left;
    background-size: 300px auto, 200px 200px;
}