General Features
        RF or IR, we have both
        Two-way, never jam, never lost
        High Speed - 100 audience keypads transmission < ONE second   (similar products may require 5 seconds or more). Maybe it is the fastest system of this kind.
        Wide-angle signal transmission: up than 250 degrees angle (RF 360 degrees angle)
        ID number changeable (compare to the obsolete ID setting mode of similar products)
        Up to 50 feet transmission and reception distance (RF 328 feet)
        Support cascade and uplink option
        Support up to 15 receivers (IR,one main, 14 extension; RF no)
        Support up to 500 audience keypads
        Easy to install, easy to use
        Plug-in software of MS PowerPoint
        Colorful and multiform multimedia questions
        Provides 10 kinds of activity-models for interactive teaching and meeting.
        Professional statistics analysis engine, automatically produce 10 kinds of reports tracking and recording the   process of the activities.
        Support self-paced answering.
        Multifunctional instructor remote
        Third party software supportable
        OEM or ODM acceptable