Yealink YHS34-DUO, Entry-level RJ9 headset, Binaural, Leather. Designed with replaceable soft leather (YHS34) and ear cushions, the business headset can softly cover the ear and support long conference calls, which keeps you enjoying supreme comfort all the time. Made for calls, YHS34 is kitted out with a high signal-to-noise ratio speaker and independent cavity design.