This is the Plantronics CS510 + HL10 combo package. Plantronics CS510 has a new look, improved performance, same reliability as the previous CS351N. Fall in love all over again with the new CS wireless headset series.  Plantronics legendary CS wireless headset family is setting a new wireless headset standard for desktop office phones. The new system features a Over-the-head monaural headset (cover one ear) for comfort and awareness of environment, streamlined design and improved performance all with the same renowned reliability. Retail Price $409.95

• Over-the-Head Monaural headset
• Includes Plantronics HL10 Lifter in this combo package for remote answering
• Electronic Hookswitch Cable also available for remotely answer - call for compatibility with your phone
• Gain mobility - multitask, hands-free up to 350 feet
• Audio controls volume/mute at your fingertips
• Adaptive power system optimizes for range and talk time
• Voice-dedicated DECT (1.9Ghz) technology eliminates Wi-Fi interference
• Advanced wideband audio using CAT-iq technology enables clearer conversations
• Choose narrowband mode to preserve talk time or wideband mode for clearer conversations
• Noise-canceling microphone filters out background noise
• Digital Signal Processing (DSP) provides more natural voice sound
• Sound Guard technology protects against audio spikes
• Conference in up to 3 additional CS510 or Savi headsets for enhanced collaboration
• New headsets can subscribe to a base by simply docking the headset
• Auto answer option lets you answer/end calls by removing/replacing the headset from the base
• Up to 9 hours talk time on a single charge
• 1 year warranty

For more information, see Plantronics CS510 datasheet or Plantronics CS510 manual