Features: brand new and high quality Replacement battery ,our hearing amplifier runs with high quality button battery, it is easy to use ,small size with large capacity ,long standby for time,. Good gift for elder,it is easy to use, if your elder are having soecific instances of difficulty of hearing, this is a practical, efficient, cost effective hearing device. Fine sound quality comfortable listening, digital chip can achieve noise reduction, which can filter the surrounding noise while amplifying the environmental sound, making the sound clearer. Invisible design , it is easy to wear comfortable ,invisible design can avoid embarrassed,confident to wear daily. Lightweight and comfortable,hearing aids for adults is small and light-weight, it‘s fit to wear and more comfortable to use. it is match cleaning tools to extend service life. ergonomic design, not easy to fall off. Specifications: Material:Plastic+Metal Maximum Output:130±5dB Sound Gain: 35±5dB Harmonic Distortion: ≤10% (1000 Hz) Equivalent Input Noise Level: ≤32dB Frequency Range: 300--4500 Hz Battery Voltage: for DC 1.5 v Directionality:All-round Package Includes: 1 Piece Hearing Aids 2 Piece Battery 3 Pieces Earplugs 1 Piece English Manual note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item.