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• Tips for buyers:The reason for howling/noise:In order to make a mini length hearing aid, the inner amplifier and the microphone are near to one another The sound is always received and expanded, so it has a definite option of produce howling after power-on At present, small listening to aids and high-power listening to aids on the market can rarely keep away from howling, and only full-digital hearing aids can keep away from howling Ways to avoid howling/noise: 1 When the ability is high (the amplified sound is large), howling is prone to happen Therefore, gradually increasing the volume from low can efficiently keep away from howling 2 When the ear canal is totally sealed, there isn't any howling sound Therefore, please use listening to aids after cleansing your ear canal, and verify the earplugs from extensive to small to find essentially the most appropriate earplugs three After the hearing reduction enters the ear canal, it is recommended to push the hearing relief together with your fingers and preserve it for 1-2 seconds, after which release it to totally amplify the earplug In addition:If you do not know how to use it or there is a concern together with your listening to aid, please don't rush to go away a unfavorable overview and contact us Thank you G16 Product parameters HAF/FOG Gain (dB) : 26dB Frequency range(Hz) : 500-4500Hz Package integrated 1 × Hearing relief 1 × Storage box three × Earmuffs(different sizes) 2 × Matching battery (A10) 1 × Hearing relief cleansing brush 1 × Volume adjustment bracket 1 × Instructions(Please make certain has read the handbook earlier than using) G17 Product parameters HAF/FOG Gain (dB) : 30dB Frequency range(Hz) : 300-4000Hz Package integrated 1 × Hearing relief 1 × Storage field 3 × Earmuffs(different sizes) 1 × Cleaning Brush 1 × Volume adjustment bracket 1 × Charging adapter 1 × Charging head 1 × Instructions(Please ensure has learn the handbook before using) K188 Product parameters HAF/FOG Gain (dB) : 30dB Frequency range(Hz) : 300-4000Hz Package incorporated 1 x Hearing aid 3 x Earplug (Different sizes) 1 x User guide 1 x Box 1 x Tool

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