A:
I believe it is. But, the compatibility is not between the mouse and the keyboard, but between each of these devices and the dongle. My K350 and M325 both use Logitech's "Unifying receiver" technology which means any of Logitech's devices with that technology can sync to a "Unifying receiver" dongle. I use the M705 with the keyboard and the M325 for my tablet, but I seem to remember trying the M325 on the PC where the keyboard is connected to see which mouse I would use with which computer.