No, the ST100 cannot connect wirelessly to a PC. It connects to your computer via USB.
No, the ST100 does not support wireless charging. You can plug your headset into the USB port on the headset stand to charge it.
Yes, connecting the headset into the ST100 will have it show up in Windows as a separate sound device.
No, the ST100 does not have any speakers on it.
The cable is 6 feet long (1.83 meters).