ISOtunes PRO Aware IT39 are active in-ear hearing protectors with Bluetooth audio and situational-awareness pass-through. Attenuation is rated SNR 26 dB with active noise cancelling and replaceable cushions, and the housings are finished in high-visibility green to EN 352. The earphones weigh 224 g and are intended for construction, workshop, and industrial users needing certified hearing protection with wireless call and music capability.