Using iPhone as Keynote or PPT remote controller. - page next using volume key + - page previous using volume key - - show indicator on screen by touch on the screen - moving indicator demo video: http://youtu.be/gYOmNWC3GRU * You need a Mac with Bluetooth 4.0 to use with this app * To determine your Mac's Bluetooth version Select About This Mac from the Apple menu. Click on the More Info... button. Click on the System Report... button. Select Bluetooth from the sidebar on the left, underneath "Hardware." Scan down the list of information until you find "LMP Version." If your Mac is equipped with Bluetooth 4.0, LMP Version will say 0x6. Anything lower than that is an older version of Bluetooth, are not support to use with this app.