How do I switch the G435 between LIGHTSPEED and Bluetooth connections?
Press and hold the Mute button for 3 seconds or longer to toggle between connections. When switching to LIGHTSPEED, the LED will light cyan for 5 seconds; when switching to Bluetooth, the LED will light blue for 5 seconds. (Page 5)
From the official Logitech G435 Lightspeed Wireless Game Headset manual, page 5
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