This Kenwood KHS-10BH Noise-Reduction Headset has an over-the-head type headband and has heavy-duty noise-reduction of 24 db. The noise-cancelling feature is built into the boom microphone's line and aids in blocking unnecessary and unwanted background noises from being transmitted. Also, this headset features Push-To-Talk (PTT) which makes communication easier with all compatible ProTalk (TK) series 2-way radios.