How do I switch between LIGHTSPEED and Bluetooth connections on the G435?
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.
From the official Logitech G435 Lightspeed Wireless Gaming Headset manual, page 5
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