This inexpensive wireless gamepad works great in vArranger2. It allows me to assign any 10 functions to control vArranger2. I am going to add a mini Bluetooth keyboard. The whole setup will give me scores of functions to control vArrnager2- all wireless while strolling around with my accordion. I was at least 40 feet away from my MS Surface Pro and it still worked fine.
http://www.ebay.com/itm/8Bitdo-ZERO-Mini-Controller-Portable-Bluetooth-White-Wireless-GamePad-New-LO-/161880854500?hash=item25b0d9cfe4:g:2rMAAOSwhcJWPWD4