Features About Receiver
       USB port or 232 port.

       High processing speed - 500 audience keypads'   transmission < 6 second.

        Support up to 500 student keypads

        Easy to install - use one RJ-45 cable for data & power

     Optional devices - extension receiver to extend the coverage of signal reception and transmission. ENJOY   Audience Response System can be connected with up to 14 extension receivers, which enables its usage in a   very big or trapeziform auditorium with pillars. It can also be used in several isolated rooms synchronously.(IR version).