Brother VT1000 Wired Voice Conferencing Device Additional Features: Crisp and clear voice with an omnidirectional microphone Advanced audio features including noise and echo reduction Convert your smartphone into a high-quality speakerphone Optimized to work with Brother OmniJoin Web Conferencing USB 2.0 connectivity Noise Cancelling Bandwidth: 200Hz - 20KHz Operating System Compatibility Omnidirectional microphone Smartphone Phone Bridge Presentation Mode Operating Temperature Range: 32 degrees F - 104 degrees Microphone: Yes Speakerphone: Yes Connections: USB 2.0 Dimensions: 4.9 x 2.7 x 1.2 Weight: 0.34 lbs.