For those who have difficulty hearing the TV or conversations. This is a rechargeable, ear-hook type sound amplifier. It can be used on either the left or right ear, and the volume can be finely adjusted with a dial. Easily optimize how you hear with high-frequency/low-frequency mode switching. ■ Main Features Rechargeable & Long-lasting: Up to approximately 12 hours of use with a 2-3 hour charge One-touch Switching: H = High-frequency mode / L = Low-frequency mode / OFF Easy Operation: Volume dial that you just turn Universal for Left and Right Ears & 360° Rotating Nozzle: Fits the ear, making it easy to put on and share Lightweight Design: Easy to use with glasses Uses: For watching TV, conversations, and support for hearing when going out ■ Specifications (from image description) Color: Gold Maximum Output Sound Pressure Level: 129 ± 3 dB Sound Pressure Gain: ≥40 dB ± 5 dB Frequency Range: Approximately 450-3400 Hz (general voice band) Power Supply: DC 1.2 V / Current: 1.2 mA or less Input Noise: 32 dB or less Charging: micro USB, fully charged in approximately 2-3 hours ■ Accessories microUSB charging cable × 1 ■ How to Use (For Beginners) 1) Put it on your ear while it's OFF → 2) Select L/H → 3) Turn up the volume little by little after lowering it (to prevent howling) ■ Important Notes This product is not a medical device (hearing aid). Consult a medical institution if you have severe hearing loss. The experience varies depending on hearing and environment. The numbers are approximate. ■ Related keywords that are easy to match in searches (naturally described in the explanation) Rechargeable sound amplifier / Ear-hook type / Universal for left and right ears / Earphone type / TV conversation support / Lightweight / High-frequency low-frequency mode / Senior citizen's Respect for the Aged Day gift