SANDBERG SpeakerPhone Bluetooth+USB 80013319 126-41 Product Description: Sandberg - speakerphone Product Type: Speakerphone - Bluetooth - wireless, wired - USB Compatibility: Mac, Windows Recommended Use: Computer Connectivity Technology: Wireless, wired Wireless Technology: Bluetooth Bluetooth Version: Bluetooth 5.1 Audio Specifications: Frequency Response 20 - 20000 Hz Signal-To-Noise Ratio: 70 dB Microphone Operation Mode: Omni-directional Microphones Included: 4 Controls: Volume, power on/off, microphone on/mute, phone button Manufacturer Warranty: 5-year warranty