Nano Rechargeable Hearing Aids diversified functions comfortble listening lightwight&portable easy to use , Hearing Aids Nano Hearing Amplifiers for Light or Medium Hearing LossPackage Inside1 pair x Nano Rechargeable Hearing Aids1 x packing box1 x instruction manual How to Care for Hearing Aids？ 1. Dryness: Hearing aids are electronic products and are prone to moisture. Pay attention to waterproof, moisture-proof and dust-proof. 2. Cleaning: Wipe with a dry, soft cloth. Use a small brush to clean the earwax inside and around the sound hole of the hearing aid. Wearing both devices at same time, or sharing with loved ones, or use one keep the other one charging as backup, widely used without any burden all is up to you.