1. Suitable for USB interface computers and notebook devices. 2. The large skin-friendly earmuffs are breathable and not stuffy, soft and comfortable to wear. 3. Thickened high-quality copper wire, faster transmission, plus a tensile protective layer, easy to clean. 4. Speaker size: 50mm 5. Impedance: 15 Ohm 6. Sensitivity: 102+/-2db 7. Frequency range: 20Hz-20KHz 8. Microphone sensitivity: -38+/-3dB 9. Microphone impedance: 2.2k Ohm 10. Directionality: omnidirectional 11. Cable length: 2m 12. LED working voltage: DC 5V 13. Working current: 180mA 14. Headphone jack: USB+3.5mm
