Puro Sound Labs IEM100 in-Ear Headphones THE HEALTHY HEADPHONE. Patented protection switch can limit the headphone volume to a safe range (under 85 dBA). Enjoy the music freely without the worry of hearing damage. STUDIO GRADE SOUND QUALITY. Puro Balanced Response curve balancing bass, mids, and highs for impeccable sound reproduction ERGONOMIC DESIGN. Three pairs of comfortable silicone ear tips for a custom fit and tight noise-blocking seal NOISE ISOLATING. Blocks 94% of ambient noise at 1kHz