Rechargeable Digital BTE Hearing Aid Adjustable Volume Deaf Mini Sound Amplifier Portable Elderly Hearing Amplifier color:R03L1-Pair can be expanded or folded

can be expanded or folded

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such as travellers and students

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Rechargeable Digital BTE Hearing Aid Adjustable Volume Deaf Mini Sound Amplifier Portable Elderly Hearing Amplifier color:R03L1-Pair can be expanded or foldedNote 1. Adjust volume to the minimum before wearing. 2. Choose an earplug of slightly bigger size to avoid whistler. 3. Increase volume gradually to avoid sudden increase in sound. 4. If you hear a howling, check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. If it still does not work, please check the chat window leave me a message. 5. Keep the ear