Type: Wired VoIP Standards: USB Ports: 3.5 mm headphone jack LEDs: LED light-ring for indication of call status Dimensions: 5.25" x 3.24" x 0.85" Weight: 5.4 oz. Specifications: Keypad: Call Pick-up/Hang-up key Application Launch key Volume Up/Down keys Mute key Loudspeaker: Frequency response: 300 Hz to 19 KHz Volume: adjustable to 84 dBa (peak) volume at 0.5 meter Microphones: 2 cardioid microphones 200 Hz to 20 kHz Auxiliary Audio Output: Desktop PC speakers can be plugged in for audio pass-through Frequency response: 200 Hz to 22 kHz Audio Enhancements: Automatic Gain Control Dynamic Noise Reduction Gated microphones with intelligent switching Features: Based on the same technology used in Polycom's legendary line of triangular SoundStation conference phones Enables ...