Hello, I have two questions about this keyboard: 1. is it possible to operate the keyboard on two WIN PCs and an Android phone in parallel without installing special software on the devices? 2. can you use the multiple device function only with Bluetooth, or also by means of two of the USB receivers for the WIN PCs and Bluetooth for the Android phone? If the latter, is it possible to order an additional receiver? (I would rather use the receivers than Bluetooth). Thank you very much! Hauke Basse