ℹ
info Logitech
Status LED flashes twice in orange
Sidetone has been enabled.
? What Causes This
Mute button double-pressed.
ⓘ What This Means
No action required. Sidetone is active. Double-press Mute again to disable.
Source: page 9 of the official manual
From the manual
This error code appears in:
Logitech G435 Wireless Gaming Headset