S661 Controller Manual Exclusive Jun 2026

: Hold Volume+ and Volume- simultaneously while playing music to switch between Standard and Vocal Booster modes. Battery Check : Click either volume button while paused.

Check for mechanical binding or shorted motor windings. s661 controller manual exclusive

: Hold Volume+ and Volume- simultaneously while playing music to switch between Standard and Vocal Booster modes. Battery Check : Click either volume button while paused.

Check for mechanical binding or shorted motor windings.

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