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Here's information on the frequency bands and dB adjustment of the JLab 2-in-1 Hear OTC Hearing Aid and Earbuds: Frequency Bands: Low: 250 Hz - 1000 Hz Mid: 1000 Hz - 4000 Hz High: 4000 Hz - 8000 Hz dB Adjustment: Range: Up to 35 dB gain Control: Independent volume control Additional Features: 4 Preset Hearing Modes: Loud, Restaurant, Conversation, and Neutral Noise Reduction and Feedback Suppression In-Ear Detection Bluetooth Connectivity
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