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Momentum 4] Sennheiser Smart Control App Update adds more accurate EQ decibel count and voice/tone prompts. Firmware update for the M4s coming soon hopefully? : r/sennheiser
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Sennheiser Momentum 4 Wireless Headphones with Adaptive Noise Cancellation, Customizable Sound via Sennheiser Smart Control App, Up to 60 Hours Playback Time with Fast Charging - Black : Amazon.sg: Electronics
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