*The amplifier hearing aid is well made， can reduce noice， with good sound quality. Volume Adjustable & Silicone earplugs in 3 sizes: fit most ears. *Ultra mini size and lightweight: easy and comfortable to wear. *Shock and drop resistant， moisture proof and high temperature proof: user-friendly design. *Made of high quality material， durable and reliable for long time use. Max saturated sound pressure level: 130?��5dB Full-on acoustic gain: ?Y50dB Harmonic distortion: ?��50% Frequency range: 300 ~ 4000 Hz Equivalent noise: ?�� 30 dB Voltage: DC 1.5V Current: ?�� 4 mA Battery: 2 x AG13 button battery External size: 4.5 x 4.5 x 2 cm Package:1 x Hearing aid 2 x Button batteries 3 x Earbuds 1 x English user manual In original package