Advanced Presentations – Audience and Environment — 78 Comments

  1. That is good, And this is a very beautiful and interest topic to us. So! Please SIR We need more again. May GOD Bless U and Us.

  2. thanks sir, that was awesome, but l have a question please you talk about the size of the room and the screen but what about the volume because if it is in a large room l think they will need speakers or a microphone. thank once again.

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