USB Headset Wired Headphone with Microphone for Laptop Desktop Call Center Features: 30mm driver units of the earphone deliver clear balanced sound quality Quality flexible noise reduction mic makes your voice can be clearly heard Easily volume up/down, mute or turn off mic via wired control Soft PU leather ear cushions and ergonomic head beam ensure wearing comfort Universal USB plug, widely compatible with laptop, desktop, corded telephone, etc Specification: Item Name: On-Ear Headphone Plug Type: USB Speaker Impedance: 32 Ohm Driver Unit Diameter: 30mm Driver Unit Sensitivity: -33dB Mic Directivity: Omnidirectional Mic Impedance: 150 Ohm Mic Sensitivity: 47±3dB Material: ABS Plastic Cable Length: 2m Note: Please allow 1-3cm (0.4-1.18in) difference due to manual measurement and slight color variation for different display setting. Package Includes: 1 x Wired Headphone