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it can tell which way you're wearing it—thanks to the smart mic boom
tune out noise
the Plantronics CS520 is a one-stop solution for professional communication
Tune into work
Plantronics Calisto P240-M USB Handset 57250.001 Spare Part it can tell which wayPlantronics Calisto P240 M USB Handset, UC Standard Version Built for UC Applications and Soft phones from Avaya, Cisco, Microsoft and More Make the evolution to PC communications simple with the new Calisto 240 M USB handset. It's perfect if you're new to PC calling. With its portable size, LCD display and integrated personal speakerphone, managing PC calls on the go has never been easier. And with top of the line audio technology, you'll like how