S/N RK830 175172 (mentioned in absence of a rev)
Received my rk61 a few days ago and so far im more then pleased with the little board.
Got the white version with browns switches and blue light.
I think the board might be a rev 2 but i definitely have the same firmware as mrkrojo, and im on windows 10 so this is not a mac thing.
The "manual" it came with was Chinese only and, judging from the images, did not contain all shortcuts mentioned in this thread.
Since there obviously have been different (firmware) versions, I thought Id add my two cents
This version responds to most shortcuts mentioned in the thread (aside from volume up and down)
Also Fn+LeftAlt for reset, and, like mentioned above, to Fn+LeftCtrl for lockin the Fn layer.
The default state of the board is having the arrow keys on, so without locking the Fn layer, or pressing Fn, you will get an arrow up instead of the "/".
I do mostly html/css/javascript myself and i use the arrow keys a lot in combination with left shift and Ctrl so this suits me just perfect.
I'd much rather press Fn for the "/" or "?" when i need those, then miss my arrows.
Plus i personally cant really type , i never use the right Ctrl or Alt so im not missing much there either.
The Fn+LeftAlt lock feature is (now) however in my opinion somewhat useless:
It works like a true Lock (think caps lock) this means that once its in that state, you cant quickly use Fn to toggle back to the normal key function;
you really have to unlock again.
This state locks all real Fn keys (apart from lights up or down, or the pairing function keys)
Someone wanting default "/", right Alt and right Ctrl for normal two handed typing will have a useless board in this locked mode.
Yes these work fine now but keys y,u,i,h,j,k,n,m are now also locked in their Fn version (PrtSC, PgDn, etc) and if that isnt enough also numers 1 to 0 are F1 to F10 and you've swapped all brackets for F11 and F12.
Any normal typing on a board locked in that mode is impossible, and even if the Fn key would toggle to normal state, it would be too much hassle to type on.
So even though I personally couldn't be happier with this "arrows on by default" decision, i can imagine that if you never use arrows and you'd like to do a lot of normal traditional typing on this board, you would miss the forward slash, question mark, and both right Alt and Ctrl probably