1、[Ultra Clear Call] Telephone headset with microphone, ENC noise reduction technology, optimized sample rate conversion, equalization, dynamic range control and sound signal processing, eliminate background noise. 2、[Ergonomic Design] Sturdy and durable phone headset, boom can be rotated 180 degrees, the microphone bar can be rotated 330 degrees, so that the voice output more smoothly, clearer calls. 3、[Flexible Microphone] USB phone headphone with adjustable microphone pole, free inside and outside bending, to achieve accurate adjustment of the microphone position to accurately pick up your voice. 4、[Volume Adjustment] This USB computer headset supports one touch mute, volume adjustment. Suitable for devices with USB interface. Applications for home, office, call center, telemarketing, teleconferencing, etc. 5、[Retractable Headband] USB headphone with premium manganese steel headband, retractable adjustment, adapt to the size of the head, expand at will without scratching the hand, reduce the pressure of wearing for a long time.