HP Poly Slušalice Voyager 4320 USB-A +BT700 dongle 77Y98AA

Office/Call center, Binaural, SoundGuard DIGITAL, Wired & Wireless, USB Type-A 
Move freely between all your workspaces with this portable headset. Roam with ease with up to 50 m / 164 ft of wireless range. Reduce background noise and control your conversations with Acoustic Fence technology. Boost your productivity with continuous comfort, up to 24 hours of talk time, and connectivity to multiple devices. Extend your talk time by using the desktop charge stand or by using the headset in the corded USB mode.