Physical different for MC3300 will be giving different operating effect for the zebra MC33 series mobile computer user.
Zebra MC3300 Mobile Computer (45° Scan Configurations) - Peak Technologies
Handheld scanning grab HD protective film for Zebra MC33 Phone PDA Reader HD anti scratch electrostatic PET film Free Shipping|AC/DC Adapters| - AliExpress
Zebra SG-MC33-RDHLST-01 MC3300 Rigid Holster | PTS Mobile