Just found a video, the boss of PLUM (for Noppoo) explaining design and functionality of the dual-mode (USB + bluetooth) RGB backlit Nano 75.
http://v.youku.com/v_show/id_XNjQyNDM1NjQ0.html
His choice of the 'lightning' connector was that it is more robust than the micro-USB; I am not sure if he is informed about that some/most of the lightning connectors in the market are not compatible with the usage on this keyboard.
He didn't mentioned the switch, but mostly the RGB lighting and the 3 layers with 1 fully programmable. Anyways, models with all kind of mechanical switches (including the Topre cone) have been spotted so far.
These dual-mode RGB models are super quickly gone on Taobao itself in mainland China, and almost never made it to the overseas market.