Matosio Octopus Pro2 P7 Guide Rapide page 6

2.2 USB connection
Connect with computer by USB cable
2.3 Connect by Wireless Receiver (Optional)
Insert the USB receiver to your computer, and start pairing mode on
speakerphone, wait for about 15 seconds until the pairing is completed.
Charging
3.
Connect the main speakerphone by USB cable to an AC adapter or USB
charging port, it will start to charge.
USB Type-C cable
Wireless Receiver
USB Type-C cable
Charging Adapter
USB port