1、NICE FIT: The sound aids are made of medical grade silicone material, have an ergonomic design, and have a good fit with ears, not easily removed. 2、PREMIUM SIGNAL TRANSMISSION: The use of premium chips results in good sound quality and stable transmission of hearing aids. Reduce noise and stop squeaking. 3、CONVENIENT USE: The sound amplifiers are compact and light, so they are not only provide outstanding sound, but also easy to wear. 4、LIFE ASSISTANT: If you have trouble hearing others speak, a sound amplifier can help you regain your hearing and lead a normal life again. 5、WHERE IT APPLIES: Wearing a sound amplifier means rediscovering the delight of socializing with friends and family, feeling more assured at work, and enjoying movies, music, and TV shows more. Item Type: Rechargeable Sound Amplifier Product Material: ABS, Silicone Headphone Battery Type: Lithium battery (shipped with built in battery) Battery Type of Charging Bin: Lithium battery (shipped with built in battery) Battery Capacity of Single Headset: 35mah Charging Compartment Battery: 500mAh Frequency Range: 300 to 3800Hz Noise: Less than or equal to 30dB 1 x Sound Amplifier 2 x Earplug 1 x Brush 1 x Screwdriver 1 x Adapter Port 1 x Manual 1 x Charging Cable 1 x Charging Bin