Hi engineerfr, at the moment there is not a recommended screen, all should work fine with the Ebox Air, i used mine tonight for the 1st time on a plain magnolia coloured wall & it worked great, if you really want a screen make sure its large enough for the size of projection you want, max size 120inch.
When I go and use eshare app to use its remote it doesnt work. Also, using the pointer it moves around when I navigate it, but when I go to select an app or anything, it does not open anything. I see the notification where it recognizes my iphone. Thanks any help would be appreciated.