Which Product Should I Choose?

Diameter

VS80-KIT-1, VS80-KIT-6: 5.5 mm
VS80-KIT-2: 4.5
VS80-KIT-3, VS80-KIT-7: 4.9 mm
VS80-KIT-5: 10 mm
VS80-KIT-8: 3.9 mm
VS80-IR21: 19 mm

Display resolution

VS80-IR21: Camera probe: 160 × 120 IR Screen resolution 1024 × 600
VS80-KIT-1, VS80-KIT-2, VS80-KIT-4, VS80-KIT-5: Camera probe: 640 × 480 Screen resolution 1024 × 600
VS80-KIT-3, VS80-KIT-6, VS80-KIT-7, VS80-KIT-8: Camera probe: 1280 × 720 Screen resolution 1024 × 600