Headphone Amplifiers descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Mini Hearing Aid Sound Amplifier In The Ear Tone. Features : 1. New, 2. Mini Design for Portability 3. Anti-shock& Anti-drop,user-friendly Design 4. Super Mini Size and Light Weight, Not Easily to Be Seen 5. Reduce Noice, Provides Good Sound Quality 6. Durable and Reliable for Long Time Use 7. Silicone Earplugs in 4 Sizes : Fit Most Ears 8. Adjust Volume to the Minimum Before Wearing 9. Increase Volume Gradually to Avoid Sudden Increase in Sound Specifications : 1. Max Sound Output : 110 ±5dB 2. Sound Gain : 30dB 3. Total Harmonic Wave Distortion : 10% 4. Frequency Range : 300-4000Hz 5. Input Noise : 40dB 6. Voltage : DC1.5V 7. Current : 4mA 8. Color : As Pictures Package Includes : 1 X K-80 Hearing Aids 1 X User Manual 1 X Case 2 X AG3 Button Cells 4 X Units of Earplug of Different Size. Products number : SOMONO94893