Price $75 to $250 (4)$250 to $350 (2) Features Full Duplex AudioEcho CancellationNoise Reduction (4)Bluetooth A2DPPortableEcho CancellationVolume ControlMuteLED IndicatorAuto Power OffRechargeable (2) Weight (Approximate) 195.4 g (2)245 g (2)280 g (2) Product Model 510+ MS (2)Speak2 40 (2)Speak2 55 (2) Marketing Information Jabra Speak 510Engineered to be unplugged.Portable USB and Bluetooth® speakerphone Crystal-clear conversations Simple and fast set-up Compact, portable design Connects via USB or Bluetooth® Compatible with all leading UC platforms In-room coverage for up to 4 people (2)SPEAK2 40 (2)SPEAK2 55 (2) Package Contents Speak2 40 Speakerphone Carry Pouch Safety Information Warranty (2) Speak2 55 Speakerphone Carry Pouch Safety Information Warranty (2) Microphone Pickup Range 90"" (2286 mm) (2)90.60"" (2301.24 mm) (2) Connectivity Technology Wired (2)Wired/Wireless (2)