Description. 100% brand new and high quality Hearing aid Maximum sound output. 1305 dB Maximum sound gain: 555 dB Harmonic distortion: 10% (1000 Hz) Frequency range: 300-4500 Hz Input noise: 30 dB Battery. AG13 button cell (not included) Operating voltage: DC1.5V Operating current: 3mA Color: As shown in the picture Package contains 1 x JZ-1088A hearing aid 3 x earplugs (different sizes) 1 x user manual 1 x box (optional) Precautions 1. Turn down the volume before wearing it. 2. Choose earplugs in a slightly larger size to avoid whistling. 3. Increase the volume gradually to avoid a sudden increase in sound. 4. If you hear a whistling sound, check that the earplugs (silicone) are properly fitted and have a tight fit. Choose earplugs appropriately and connect them well to ensure no air leaks. 5. Keep the earplugs clean 6. Remove the batteries if not in use for a long time. Color: As shown Package: opp bag (without carton) Package contains 1*1pc hearing aid (without battery) (without carton, no accessories other than the product included ) Warning. < p>1. Due to differences between different monitors, the images may not reflect the actual color of the item. We guarantee that the style is the same as shown in the pictures. 2. 2. Please allow slight size variations due to manual measurement differences.