Feature:1. [RJ9 PORT PHONE HEADSET]: The high quality noise reduction call center headset is compatible with call center wired telephone equipment and landline phones with RJ9 ports.2. [WIDELY PRACTICAL]: Telephone headsets are very suitable for call center, telemarketing, online education, training, after sales service and other tasks, freeing hands and convenient to use.3. [NOISE REDUCTION HEADPHONES]: The phone headset has a noise cancelling microphone and a 150 ohm speaker to ensure excellent quality and clear sound. At the same time, hearing technology is adopted.4. [COMFORTABLE AND ADJUSTABLE]: Ultra lightweight phone headset with adjustable headband, suitable for all head sizes, flexible microphone and soft ear cushions, can improve the comfort of wearing all day.5. [FLEXIBLE AND 330° Flexible and adjustable Mic. Accurate design, high‑quality materials, and integrated headband structure make this call center phone headset with microphone more flexible and durable.How to Use:Plug and play.Specification:Item Type: Telephone HeadsetMaterial: ABS+MetalFrequency Response: 20-20kHzImpedance: 150ΩSensitivity: 125dBMaximum Input Power: 10MWPlug: RJ9Wire Length: Approx. 1.6m / 5.2ft Package List:1 x Telephone Headset