This ZeroNoise ear plug speaker kit is ideal for circuit racing where pit communication is required.  Available in a range of semi-custom fit or universal foam tipped these earplugs are designed to reduce ambient noise by up to 26db to provide much clearer communication. The plugs are sweat resistant for comfort and feature high efficiency speakers to deliver optimum clarity.High efficiency speakers for excellent sound qualitySemi-custom fit options with long or short ear canal3.5mm or RCA connection optionsIdeal for circuit racingAvailable with traditional universal foam tipped plugs but now also with a semi-custom fit plug option which are ergonomically shaped to fit the ear. Long or short ear canal versions are available and they include a cleaning kit. The foam tipped kits do not include a cleaning kit but replacement tips are available to purchase separately.The Circuit ear plug speaker kit is available with connection options of either a 3.5mm male jack plug or a single RCA conne