How do I set the maximum volume on the G435?
Press and hold the Mute button and Volume UP together for 3 seconds or longer to set 100 dB (LED flashes orange 3 times), or press Mute and Volume DOWN for 3 seconds to set 85 dB (LED turns solid orange for 5 seconds).
From the official Logitech G435 Lightspeed Wireless Gaming Headset manual, page 7
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