Item Type: Call Center Headset Material: ABS, Sponge Premium Sound Earmuffs: Imported Accuracy Sponge Speaker Diameter: Approx. 30mm/1.18in Frequency: 20-20000Hz Sensitivity: 115dB Impedance: 32 Ohm Maximum Power: 100mW Package List 1 x Call Center Headset 1Stylish Shape, Comfortable to Wear: Call center headset adopts innovative design and fashionable shape. Lightweight material, no pressure on the head, suitable for long time wearing. 2HD Voice Communication: Telephone headset has high definition voice communication, restoring my voice. Professional microphone noise reduction technology, effectively filtering environmental noise. 3Hearing Protection: Customer service headset adopts hearing protection design, effectively prevent sudden high decibel sound damage to the ear. 4Rotatable Microphone: The microphone of call noise canceling headphones can be freely rotated and worn left and right for easy use. 5Retractable Design: Customer service headset's headband can be freely retracted, moderate elasticity, can adapt to different head shape people.