I was researching page turners yesterday, but all I want it to do is control page up and page down on my laptop, because I just read lyrics and/or chord changes from word processor.
Maybe a Bluetooth would be best for that, since no wires necessary. ?

I purchased but rarely use the Pageflip Bluetooth pedal for page turning, works pretty well but found that somtimes to initially connect it can be finicky.

PageFlipBluetoothPedal

l was tempted to go the bluetooth route with the pedal, but a bit concerned if it stopped working etc, so was thinking more along the lines of the Usb

While searching for a pedal l found this home made remedy made from a wireless mouse.

http://www.instructables.com/id/Wireless-USB-Page-Turner/

Granted, I am not reading/playing complex songs, but personally, I have not found a need for a page turner ... it seems that I can always find a split second to turn a page when necessary with one hand or the other ... a simple swipe across the screen and it is done ...

Most sheetmusic readers allow you to turn pages using midi..

You could set up your keyboard pedals to do so...

How would one do that?