Q & A (about IR VERSION)
  How many student remotes can we use at one time?
        From 1 to 500.

  How fast is the ENJOY Audience Response System(IR)?
        It can handle 100 response signals in less than one second. it is the fastest one of its kind.

  What about the receivers' receiving distance and angles?
        Their receiving distance is up than 50 feet radial, and their receiving angle is up than 250 degrees.

  How many receivers should we install in a room?
        In a 100 x 100 feet room, one main receiver will be enough.
        But if the room is very big, or is trapeziform, or has impedient, such as pillars, or is seperated into sections,   extension receivers will be needed.

  If my PC only has USB port usable, can I use ENJOY Audience Response System?
        Of course you can.
        Just use a USB transfer cable. It can be bought in any PC market.

  Is the ENJOY Audience Response System infrared or RF based?
        Our ENJOY Audience Response System is infrared.
        The RF signal goes through the walls and can interfere with another room as well as cell phones, pagers, and   wireless networking, but infrared does not.

  What should we do if the audience remote is lost or is not available temporary?
        Don't worry, the audience remote ID number can be set or reset by the personal entitled, you can replace a   spare remote by just setting or resetting the ID number!