Listen Technologies LA-454 - Headset 4 for ListenTALK (Over Ears Dual with Boom Mic)Listen Technologies LA 454 headset features a boom mic for hands free communication, and incorporates dual over ear speaker design to offer improved noise isolation and increased clarity in high noise environments. Features: Increased noise isolation thanks to a dual, over the ear design Built in boom mic for added convenience Ideal for hands free communications in high noise environments Protect hearing with Noise Reduction Rating of 23. 7 dB