Series: Savi 8400 Series Color: Black Audio System Type: Headphones Brand: Poly Headphones Type: Headset Connectivity Technology: Wireless - Bluetooth Response Bandwidth (Headphone): 120 - 20000 Hz Sensitivity: 112 dB Impedance: 32 ohms Microphone: Yes Model: Poly Savi 8445 Active Noise Canceling: Noise cancellation with close conversation limiting Interfaces: USB Type-A port (PC); USB Type-C port (PC); Bluetooth Weight: 21 g Service & Support Type: Two Year Limited Warranty Features: Color display on office base for audio settings management