อายุการใช้งานแบตเตอรี่ยาวนานการชาร์จ. เครื่องช่วยฟังหูตึง มีการรับประกัน. เครื่องช่วยฟังผู้สูงอายุ. หูฟังหูฟังหูสําหรับคนแก่. เครื่องช่วย ฟัง มินิ. Sound amplifier helps to amplify sound up to 30x with low background noise. Inbuilt battery convenient to recharge. There is no battery required to replace again. Fully charged replaceable artery can stand up to 8-10 hours continues use. Best hearing keep the ear tips clean and replace. Interchangeable ear tips to seal out the noise. Tips for buyers: The cause of howling/noise: The internal amplifier and the microphone are close to each other of the hearing aid, and the sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on. At present, small hearing aids and high-power hearing aids on the market can hardly avoid howling, and only full-digital hearing aids can avoid howling. Ways to avoid howling/noise: 1. When the power is high the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume from low can effectively avoid howling. 2. When the ear canal is completely sealed, there is no howling sound. Therefore, please use hearing aids after cleaning your ear canal, and test the earplugs from large to small to find the most suitable earplugs. 3. After the hearing aid enters the ear canal, it is recommended to push the hearing aid with your fingers and hold it for 1-2 seconds, and then release it to fully extend the earplug. In addition: If you do not know how to use it or there is a problem with your hearing aid, please do not rush to leave a negative review and contact us. Thank you. Specification. Maximum Output: 130±4dB. Maximum Gain: 30±5dB. Total Harmonic Distortion: 6%. Equivalent Input Noise: 28. Package included. 1 x Hearing aid. 6 x Earplug Different sizes). 1 x User manual. 1 x storage Box. 1 x USB charging cable. Kindly Remind. 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. 5. Keep the ear plug clean. Notice. 1. Please use the matching charger to charge the product, otherwise the product may be damaged. 2. If you need to use a replacement charger, please use a charger suitable for the product. If an inappropriate charger is used to charge the product, it will cause damage to the product
