Dect & Bluetooth dual-mode wireless headset, enabling seamless plug-and-play applications in multi-devices (IP phone, PC, Cell phone). DECT Tech bring superior 606 ft long range, higher density, and safer calls. Noise-cancellation Headset: 3x 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.