
The new 12.9-inch iPad Pro features an advanced Liquid Retina display that goes edge to edge.¹ Face ID, so you can securely unlock iPad Pro, log in to apps, and pay with just a glance. The A12X Bionic chip is faster than many PC laptops and easily runs pro apps. All-day battery life.³ Wi-Fi. Over a million apps available on the App Store, including augmented reality experiences. And the new Apple Pencil and Smart Keyboard Folio help you be even more creative and productive.² It will make you rethink what iPad is capable of - and what a computer is capable of. 
Q: What does WiFi unlocked mean?
A: WiFi + Unlocked means it has WiFi and Cellular that is not 'locked' to one carrier and can be used with any carrier.
A: No the newest was unavailable, Ipad Pro 3rd generation. I am really happy with the quality on this one compared to my previous Ipads.
A: I have the same product and mine works on Wi-Fi only. You should be fine.
Q: What is the difference in wifi unlocked and wifi?
A: There is no such thing as unlocked WiFi. Are you thinking about cellular?
A: I haven't used it with music sheets or such, but it works very well with Bluetooth power point devices at both the university and hospital I work at using Microsoft power point. I don't see why not if you have a blue tooth pedal you couldn't sync it. (searches google) Turns up PageFlip Butterfly Bluetooth Page Turner Pedal and It says compatable with Ipad........
A: Keyboard is sold separately(Apple - Smart Keyboard Folio). You can purchase wifi only, or ATT or Versison versions. It says so in the descriptions on order screen. Or tell the sales rep in store what your after :) You might get discount from your cell provider if you ask for their version, other wise you will pay more for the additional cell modem added to iPad. I just use my cell as a mobile hotspot and skip the monthly fee of attaching my Ipad to cell service.