Table 31.1 contains a checklists for to consider when you make portable multimedia presentations. If any of these items are missing, your presentation could fail due to setup problems. You should advise your host of any items you cannot bring that you want to have provided for you. For example, when given enough notice, your host moniter, and extension cord, a power strip, and an overhead projector if you need one. Make sure you mention that the room must be capable of being darkened so the audience will be able to see the projected image. If the audience is large, you will want a microphone so your voice can be heard. To free your hands for working the computer during your talk, request a lapel microphone.