Model: Poly EP 310 Mono QD Color: Black Audio System Type: Headset Brand: Poly Connectivity Technology: Wired Headphones / Form Factor: On-Ear Sound Output Mode: Mono Response Bandwidth (Headphone): 20 - 10000 Hz Sensitivity: -38 dB +/-3 Impedance: 32 ohms Microphone: Omnidirectional Response Bandwidth (Microphone): 35 - 21000 Hz Active Noise Canceling: Yes Interfaces: QD (Quick-Disconnect) Cable Length: 30 in Compatibility: Windows 10; macOS Weight: 0.15 lbs. Service & Support Type: Poly standard two-year limited warranty TAA: Yes Special Feature COO: MEXICO TAA compliance: Yes