To answer your questions:

1. Selecting several photos: Yes, you can select several photos at once and print them all at once. The Instax Mini Link application lets you combine up to eight images into a single collage print.

2. Print time: The print time is not exactly 12 seconds. According to the information available, the Mini Link 2 starts printing about 15 seconds after the image is transmitted, and the image takes about 90 seconds to fully develop.