This manual explains how to safely use the projector. This manual also introduces the functions that are common to all models, easy to operate, connect and project with a USB cable (USB Display), use a document camera to enlarge and project documents (only for EB-C1925W/C1920W/C1915/C1910/C2090X), enhanced installation functions, EB-C1925W/C1915 features, easy presentation settings, and fully utilize the advantages of network connectivity. EB-C1920W/C1910/C2090X features and fully utilize the advantages of network connectivity.