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Volume
• Press the key to increase listening volume by one step.
• Press and hold the key to increase listening volume continuously.
• Press the key to decrease listening volume by one step.
• Press and hold the key to decrease listening volume continuously.
The multicolored LEDs turn green for two seconds to indicate the volume level.
The more green LEDs displayed, the higher the volume level.
The speakerphone will synchronize playback volume with a USB-connected Windows
PC and a Bluetooth-connected iPhone.
The speakerphone will synchronize phone call audio volume with a Bluetooth-
connected iPhone or Android mobile.
Mute
• Press the key to mute all the microphones.
All the multicolored LEDs turn red.
If mute while recording, all the multicolored LEDs flash red ON 2s, OFF 0.5s
repeatedly.
• Press the key again to unmute all the microphones.
• Press the key while the speakerphone is ringing to temporarily mute the
ringing tone.
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