HP Poly Savi 8220-M Stereo Headset 80033865 8D3H8AA#ABB Product Description: Poly Savi 8220-M Office - headset Product Type: Headset - DECT / Bluetooth - wireless Localisation: English / Europe Colour: Black Headphones Form Factor: On-ear Connectivity Technology: Wireless Wireless Technology: DECT / Bluetooth Radio Frequency Range: 1880 - 1900MHz Bluetooth Version: Bluetooth 4.2 Sound Output Mode: Stereo Impedance: 32 Ohm Microphone: Boom Controls: Volume, power on/off, answer/end, ANC on/off Software Certification: Certified for Microsoft Teams Manufacturer Warranty: 2-year warranty