Thanks.
That seems to be exactly what I was looking for, but one of the reviews said it didn't work with a surface Pro 3. I suppose he had other problems that had nothing to do with the sp3.
I like using the apple wireless keyboard. gotta get over the placement of the 'apple' key but it's nice and portable. https://www.apple.com/ca/keyboard/
I have the Logitech K810 which works great if you have other devices that need BT. Not quite full size, ie, no numeric keypad, but works great switching between my MBP and Android phone.