9 images minimum (7 product + 1 infographic + 1 lifestyle). A10 indexes images as "visual keywords",+22% conversion lift.
Technical specs:
Main: 1000x1000px min, white 53% RGB background
Zoom: 2000x2000px, <10% text overlay
Infographic: 1600x800px, feature-benefit matrix
Video: 8-15sec, 720p MP4 (<50MB)