Lansion Updated Design: Germany Digital chip, fine sound quality, comfortable listening. Lansion Personal Sound Amplifiers not only has better double noise reduction and prevent howling, but also has the function of instantaneous strong sound intelligent ear protection. 3 different frequency modes and 4 channel for you choices, ensure you can hear a clear voice in different environments by adjusting your settings. Safe and Comfortable: Personal Sound Amplifiers uses the latest materials, shell nano coating, waterproof and sweatproof, the color is close to the skin color of the human body, beautiful to wear; different sizes of silicone materials domes are suitable for everyone, match cleaning tools to extend service life; ergonomic design, not easy to fall off, This Personal Sound Amplifiers are small and light-weight, magic ear as seen on tv, no radiation and harm for the human ear. Noise Reduction Function: The newly upgraded smart chip, the noise reduction function is very good. Personal Sound Amplifiers sounds more natural and provides you with a wonderful experience. Excellent sound quality and comfortable listening.