1. 3 noise reduction modesEarplug provides 3 adjustable noise reduction modes. Just twist the knob to control, convenient for you to use. Designed for busy people, whether it is work, social, party, nightclub, concert, motorcycle travel focus, etc. These multi mode earplugs can easily cope with various situations, allowing you to easily set your surroundings, all day noise reduction companionship.2. Mode Selection Select the 1st mode to keep voices clear during conversations and social gatherings. Select the 2nd mode to reduce the volume while keeping voices clear at nightclubs and concerts, sporting events and any other live entertainment. Select the 3rd mode for deep focus, sleep, travel and relaxation.3. Hearing Health Protection Hearing protection earplugs utilize precise frequency filtering to block low frequency ambient noise while allowing mid and high frequency sounds to pass through clearly. This selective frequency filtering ensures that you can enjoy a quiet environment without missing important sound signals. Prolonged exposure to high noise environments can damage hearing, and earplugs can effectively protect your hearing and help you avoid the risk of potential hearing loss.4. It is comfortable to wear for a long time Earplugs have the design of ergonomics, which can ensure simple insertion and appropriate distortion. The earplugs are made of soft and environmentally friendly silicone materials. Whether you sleep for a long time at night or in a noisy environment, you can provide comfort. The earplugs have four sized ear hats: XS, S, M, and L. Considering the size of the ear canal, choose the size that suits you.