Yes, a current receiver works with a mouse. However, this does not make much sense with the normal version (without Plus) because the headphones can only be paired with a receiver if no other device is connected to it. The Plus version changes that. It only needs one receiver and thus one USB slot on the computer for six devices. For example, mouse, keyboard, headphones........ So it's not just the receiver that makes the difference, but the fact that several devices can be connected to each receiver.
Good evening, yes that is possible. The headset can have a radio connection to the dongle/PC and a Bluetooth connection to the mobile phone at the same time. When a call comes in, this is indicated by an acoustic signal via the headset. By pressing a button on the headset, the call can be answered and the music from the PC is interrupted.
I don't think so. With the dongel on the PC, one connection is open and at the same time a second one via Bluetooth, for example with the mobile. As soon as I want to pair another device via Bluetooth, the first one drops out.