Cross device. Cross platforms. Cross applications. That"s Savi Office, the next-generation headset system that lets users connect to multiple communication applications and devices--desk phones, PC softphones, and PC audio--with a single headset. With a touch of a button, professionals can connect a softphone call on a PC with a desk phone call and then attend a Webinar.2CA4821. 4821. Plantronics Plantronics Savi WO101 Office Convertible Headset.