For starters, EAS10's deliver all the benefits that make Westone custom-molded in-ear monitors totally worth the investment. That includes phenomenal comfort that makes your EAS10s virtually disappear in your ears, plus an acoustic seal that provides up to 27dB of attenuation, which allows both balanced-armature drivers to work efficiently to deliver full-range sound. On top of that, you can swap out the included solid plug with an optional filter (available in 10dB, 16dB, and 24dB) to adjust how much external sound you hear, so you don't disconnect from the band or your audience. Custom-molded single-driver earphones for serious performing musicians Custom-fit specifically to the contour of your ear for maximum comfort Deep Open Bore design provides an extra-comfortable fit and isolation Choose between 10dB, 16dB, or 24dB filters or the included 27dB plug Durable cold-pour acrylic housings provide a solid fit and a lifetime of wear Flex Canal tips are easy to insert and conform to your ear canal Compact balanced-armature drivers deliver extreme acoustic definition High-flexibility, field-replaceable MMCX EPIC cable reinforced with aramid fiber SPECIFICATIONS Type: In-ear Drivers: 1 Frequency Range: 20Hz-16kHz Impedance: 19 ohms Noise Attenuation: Custom (10dB-27dB) Sensitivity: 114dB SPL @ 1mW Plug Type: 1/8" Cable Length: 4.3 ft. Replaceable Cable: Yes Color: Custom