The 3800 Linear Series readers are built to withstand real-world abuse and offer aggressive reading performance. The 4000 2D delivers the same durabilty as the 3800 Linear Series, while adding the enhanced functionality of a 2D scanner. The 4000 2D can read virtually any linear or 2D bar code, says the vendor and has the ability to capture digital images for electronic signature capture, paperless document processing and other applications. SICK Inc.www.sickusa.com800.325.7425