About This Item:-It adopts an ergonomic design that fits the curve of the inner contour of the ear, and comes with 3 pairs of round soft silicone earplugs in different sizes to provide more wearing comfort.-Built -in intelligent noise reduction chip to reduce unnecessary background noise and provide you with clear and natural sounds.-Small size, can be hidden in the ear canal to the greatest extent possible.-It supports the use of volume control buttons to adjust the volume of hearing aids to the level suitable for you.-Equipped with a digital display of the remaining battery power, just put the hearing aids back into the charging case and the earphones will automatically shut down and charge, allowing you to use them all day on a single charge. Specifi.