Perfectly compatible with Yealink Phones Unparallel Audio Experience Ultra-lightweight, All Day Wearing Comfort Yealink YHS34/YHS34 Lite is the over-the-head style headset which is made for office worker, SOHO, or call center staff. It supports QD (Quick Disconnect) feature and it is compliant with the full range of Yealink enterprise IP phones. The Yealink YHS34/YHS34 Lite, available in monaural (YHS34/YHS34 Lite Mono) and binaural (YHS34/YHS34 Lite Dual), is a professional analog wired headset with crystal clear audio. The YHS34/YHS34 Lite offers a lightweight form factor that is comfortable to wear, even for an entire workday. It’s suitable for workers who spend a lot of time wearing headsets for voice communications. Perfectly compatible with Yealink Phones Runs right out of box, a QD to RJ9 plug-and-play setup makes the connectivity to Yealink IP phones. The phones can automatically optimizes acoustic parameters for your YHS34/YHS34 Lite. Perfect match with Yealink desk phones give you optimized audio quality. Unparallel Audio Experience Made for calls, YHS34/YHS34 Lite is kitted out with a high signal-to-noise ratio speaker and independent cavity design. The passive noise cancellation creates a richer and clearer conversations with reduced background noise. Ultra-lightweight, All Day Wearing Comfort Built for comfort with soft ear cushions and ultra-lightweight materials, the YHS34/YHS34 Lite is 10%~30% lighter than other headsets in the same range. Its ergonomic design makes this headset comfortable enough for long conference calls and all day use.