I've only used it a few times since I bought it. It has been disinfected. Please wipe it before use if you are concerned. I don't think there are any noticeable stains. I can't find the charging cable, so please prepare your own adapter and Type-C cable. [2 Modes to Suit Your Situation] This product has two modes. Standard Mode: You can hear the surrounding sounds as they are. Recommended for use at home. Outdoor Mode: Reduces environmental noise (surrounding sounds). Makes it easier to hear conversations with people when you're out and about. [With Anti-Drop Ear Wings] With in-ear hearing aids, there is a possibility of them falling out during use, so we have newly included anti-drop ear wings. They can prevent the hearing aid body from shifting or falling out when you move during housework or exercise (jogging, mountain climbing, etc.). ■Caution * Hearing aids are devices that amplify sound, and are not hearing aids. * This hearing aid can only be used by people with mild to moderate hearing loss. It cannot be used by people with severe (profound hearing loss). * Before use, please read the included instruction manual carefully, and familiarize yourself with the knowledge of the device, safety information, and precautions before using it correctly. ■Color Black ■Size (approx.) Cord length: 24cm Neck circumference: 36cm ■Weight Main unit: approx. 26g ■Set Contents Hearing aid main unit Eartips (large/medium/small/each 2) Ear wings, left and right, each 1 USB charging cable Cleaning brush Warranty card with Japanese instruction manual ■Hearing Specifications Maximum output sound pressure level OSPL90≦119dB+3dB Acoustic gain FOG≦35dB+3dB Input noise≦29dB+3dB Frequency range: 250Hz〜5000Hz Current≦6mA Total harmonic distortion: ≦5% ■Battery Specifications Voltage: DC3.7V Capacity: 110mAh Usage time: Approximately 80 hours maximum Charging time: Approximately 2.5 hours * This is the time from when the built-in capacity is empty to when it is fully charged. The time may vary depending on the battery level, the rating of the AC adapter used, and the rating of the USB power supply terminal. ■Environmental conditions during use Temperature: -10℃〜40℃ Humidity: 30%RH or more, 75%RH or less ■Storage conditions Temperature: -10℃〜40℃ Humidity: 10%RH or more, 90%RH or less Country of manufacture: China #HearingAid #Earphones #Neckband