Plantronics CALISTO 5200 USB-A + 3.5 mm Conference Device with Microphone and Speaker, Black : Amazon.co.uk: Electronics & Photo
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Poly - Sync 20+ Bluetooth Speakerphone - Personal Portable Speakerphone - Noise & Echo Reduction - USB-A Bluetooth Adapter - for Connection to Your PC/Mac/Cell Phone : Amazon.co.uk: Musical Instruments & DJ