Features: 1. Lightweight and comfortable to use. 2. Adjustable with 345 degree rotation and not easy to break. 3. Soft artificial leather earphone cover. 4. The sound quality of answering and voice-sending is clear and loud. 5. The sound tube microphone has anti-noise function. 6. Suitable for most phones, customized for call centers and telemarketing. Specifications: Material: ABS Colour: black Model: HT-101U Output: Binaural Microphone: omnidirectional Port: USB port Interface type: RJ11 crystal interface Headset type: voice chat headset Frequency response: 1000Hz Environmental noise: ≤ 60dB (A) Handset impedance: 150 OHM Microphone sensitivity: 47 ± 3dB Headphone cable: about 2.0m/78.74in (curved) Net weight: about 125g Packing List: 1 * Headphone Notes: Due to the differences of light and screen, the color of the item may be slightly different from that shown in the picture. Due to manual measurement, please allow a tolerance of 0.5-2 cm.