1Moderate size is just fitable to ears and looks concise and delicate in appearance when using it. 2Can help you attain clear and smooth sound, which provides you more convenience in daily life. 3You can increase and decrease the sound by the volume control according to your hearing habit. 4Simple to use, no complicated program and operation, suitable for slight and intermediate hearing loss people. 5Suitable for hearing loss people, also can suitable for leisure and entertainment, such as watch film, TV program, the play, attend meetings or have classes.