Polycom Compatible Plantronics Legend CS Bluetooth EHS Bundle For Smartphones & SoundPoint: IP335, IP430, IP450, IP550, IP560, IP650, IP670, VVX300, VVX500, VVX310, VVX600, VVX400, VVX1500, VVX410 Polycom Compatible Bundled items: Plantronics Bluetooth Headset, Base unit and Electronic Answerer Roam up to 33 ft. from desktop charging base or mobile device Up to 7 hours talk time, 11 days standby Precision tuned triple-mic with enhanced DSP for superior noise cancellation Automatically answers calls simply by placing headset on your ear, Automatically transfers calls between mobile phone and headset