Use the KENWOOD single muff headset with KENWOOD ProTalk 2-way business radios, Nos. 43Y985, 43Y986, 43Y990, 4KYC7, 4NPD8, 43Y987, 43Y988, and 43Y989, sold separately. • Ideal for areas with moderate background noise • Lightweight, over-the-head headset includes single ear muff, flexible headband, and boom microphone with push-to-talk (PTT) button Headset, Over the Head, On Ear, Black