▲REDUCE NOISE: Equipped with high-quality stereo headphones and replaced with better speakers, It provides discreet listening while still containing all ambient sounds, which means you can hear everything you need. ▲ADJUSTABLE: 5 levels of volume can be adjusted. It can effectively restore the sound and help users hear the missed sound most clearly. ▲EASY TO USE: One key switch, adjustable volume and on/off, simple operation. Very suitable for the elderly or children. ▲INTIMATE DESIGN: Sound amplifier is designed with firmly fitting earplugs, which can fit almost any ear size comfortably. Stylish design that looks like earplugs, avoiding the curiosity of others. ▲RECHARGEABLE DESIGN: USB Charge anytime, anywhere. No need to replace the battery. Charging for 1.5 hours, about 30 hours of use.Small and easy to carry.