Feature:1. Our box-style hearing aid is suitable for people who have severe hearing impairment, especially elderly people.2. The device\u0027s 7 adjustable volume levels allow you to fine-tune the amplification, \"1\" for the minimum volume and \"7\" for the maximum.3. \"N\" indicates normal work mode. \"H\" can help you reduce low-frequency noise to get a clearer sound. \"PC\" means peak clipping adjustment.4. 3 different sizes of earplugs (large, medium, and small) are provided, which can offer a comfortable and secure fit for different people\u0027s ears.5. The clamp of this product helps you fix the hearing aids in your pocket. Powered by AA batteries (not included) for convenient and reliable operation.Specification:Description:This product is a sound device. Using it can help you rediscover the pleasure of listening to nature's sounds or talking to others. Different from the device that is ear hook shape, this product can be fixed in your pocket, which is more convenient to control the voice volume. Specifications:Maximal Sound Output: 130dB ± 5dBMaximal Sound Gain: ＞50dBHarmonic Wave Distortion: ≤ 5%Frequency Range: 300-4000 HzInput Noise: ≤ 30dBBattery: 1 * 1.5V AA Battery (Not included)Working Voltage: DC 1.5VWorking Current: ≤ 4mAMaterial: ABSColor: White and Wine redItem Size: Approx. 11.8*11.0*4.2cm/4.64*4.33*1.65inItem Weight: Approx. 35g/1.23ozTotal Size: Approx. 17.5*11.0*9.5cm/6.89*4.33*3.74inTotal Weight: Approx. 115g/4.05oz.Package List:1 * Sound Amplifier1 * Connecting Cable 1 * Earplug Connector 3 * Earplug 1 * User ManualNote:1. This product is only suitable for people with severe hearing impairment2. Please read the user manual before using.3. To protect your hearing, please don't use this product at a high volume for a long time.