Phoenix Audio DUET-EXECUTIVE Speakerphone Type: Accessories Ports: USB connector - PC or Laptop connectivity and power 2.5mm headset connection RJ11 connector (accompanying cables provided) 3.5mm connection for external loudspeakers or headphone Power: USB power for PC and Laptop (LED will illuminate) External power supply included for phone only configurations (when Duet is not plugged into the PC) Dimensions: 3.75 x 1.25 x 4.5 Weight: 0.55 lbs. Specifications: Performance: Speech processing and echo suppression at 32KHz sampling rate HD speaker audio (16KHz bandwidth) Maintains audio performance of the PC for HiFi audio applications when external speakers are connected. Plugging in a headset will automatically turn off the speakerphone. Audio: 100% Full duplex performance - no attenuation (either way) during full duplex Acoustic echo cancel...