เครื่องช่วยฟัง มีการรับประกัน หูฟังคนหูตึง หูฟังคนหูหนวก รุ่นเดียวกันกับโรงพยาบาล(เครื่องขยายเสียง ชนิดคล้องหลังหู คนหูหนวก หูตึง หูฟังขยายเสียง ปรับเส หูฟังคนหูตึง) Rechargeable Amplifier variation [1729638158074612524]

Feature 1. Max sound gain:30±5,Suitable for mild to moderate hearing loss. (Reference hearing loss map) 2. Binaural universal design.Optional medical silicone catheter or thin wire catheter. 3. Charging time: Charging 2-4 hours,can last about 10 hours.Saves your trouble to buy button batteries frequently. 4. If the ear dome is not completely fill into ear canal or air leaks at the ear dome, which will causes a annoying whistle.We give 3 different sizes of earplugs to reduce howling and noise.Product Details Max sound output :130±4 max sound gain:30±5 Frequency range:100Hz-4000HzInstructions 1.Clean the ear canal before use. 2.Charge the hearing aid,turn the botton to N 3.When using it for the first time, please turn the volume to the minimum and then slowly increase it. 4,Try and select suitable ear dome. Install the ear dome and make sure it fits snugly. 5,Insert the hearing aid into the ear canal,adjust its position in the ear canal until the soft eartip is fully deployed and fill the ear canal.Notice 1. If the earbuds cannot fill the ear canal, it may cause feedback or whistler,So repeat step 5 to reduce howling and noise. 2. Turn off or remove the battery if you don't use it. 3. Please use the original charging head and charging cable for charging. Otherwise the product may be damaged. 4. 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. INPUT: 100-240VAC-50 / 60Hz OUTPUT: 0.2A, 3VProduct included 1 * hearing aid 1 * storage bag (optional) 5 * Silicone Earplugs 1 * charging cable 1 * charging head 1 * charging base 1 * Instructions (Please make sure has read the manual before using)