Feature 1 FLEXIBLE ROTATION: Ergonomically designed headphone, the boom can be rotated 180 degrees, the microphone pole can be rotated 330 degrees, sturdy and durable. Make the voice output more stable and clearer calls. 2 ADJUSTABLE MICROPHONE: USB headset, microphone bar adjustable, can be freely bent inside and outside, accurate adjustment of the microphone position, accurate and comprehensive pick up your voice. 3 NOISE CANCELLING: Headset with noise canceling mic, ENC noise cancelling technology for voice environment optimized sample rate conversion, equalization, dynamic range control and sound signal processing to provide ultra clear calls. 4 EASY TO USE: Wired computer headset, support for one touch mute, volume level adjustment. Suitable for devices with USB interface, can be used for business, office, call center, customer service, telemarketing, etc. 5 COMFORTABLE HEADBAND: Wired headphone is equipped with a premium manganese steel headband, stretchable and adjustable, not scratching hands, reduce the pressure on the head, long time wearing no discomfort.Item Type: USB HeadsetMaterial: ABSAmbient Temperature: -10C~+40CRelative Humidity: 10%~90%Atmospheric Pressure: 86~106KpaAmbient Noise: 60dB(A)Sensitivity: -403dB(0dB=1V Pa, at 1KHz)Impedance: 2.2KDistortion: 5%Sensitivity: 1003dB Package List1 x USB Headset1 x Manual