606 Ft DECT&BT Headset : Dect & Bluetooth dual-mode wireless headset, enabling seamless plug-and-play applications in multi-devices (IP phone, PC and Cell phone). DECT Tech bring superior 606 ft wireless range, higher density, and safer calls. | Noise-cancellation DECT Headset: 3x active noise cancelling mic and Acoustic Shield Tech 2.0, auto-block background noise. Advanced stereo tech delivers full dynamic sound quality, and achieves immersive & interactive communication. | Extended Battery Life: UC certified headset offers extended talk times, dect mode-14 hrs(mono), 16 hrs (dual); Bluetooth mode-26 hrs(mono), 32 hrs(dual). 1.5 hrs fast charging time, the headset can perform energetically after a short break. | Ergo Work Headset: Ergonomically designed adjustable headband, nano breathable and soft material to minimize ear pressure. Dual-side visual busylight office phone headset ensures you stay focused on your conversation without interruptions. | Comfort & Support: Yealink headset for computer offers a 2-year, backed by professional customer service and a technical team, that aims to provide better services. Desk phone compatible list: USB Phone: T4XS/T4XU/T53/T5XW/T58A/VP59; SBF Phone: T48S/T56A/T55A/T58A; Teams Phone: MP54/MP56/MP58; POLY IP Phone: VVX411/401/501/250/350/450; SNOM IP Phone: D765/385/735/785;