TYPES A ✅ Effective Hearing Aid: Suitable for most mild and moderate hearing loss. Increasing the volume to 30dB allows for smoother conversations without repeating and screaming. Always make sure your hearing aids are dry and clean. After two or three weeks, you'll get used to it. ✅ Battery: Put it in charging base, only 2-4 hours, you will get over 30 hours of use. ✅ Intelligent Noise Reduction: The intelligent chip divides the sound into different channel frequencies, greatly improving processing, noise elimination, feedback suppression and background noise elimination. Make sure you hear clearly at different volume levels. .