Product parameter 

Recommended meeting room size: 3-5 participants in a room of 10-20 Square meters.
Output: USB 3.0 & HDMI.
Control Protocol: VISCA, PELCO-D/P (RS-232，RS485)
Connection: Bluetooth or USB(version 2.0). 

Battery 

NA100B: build-in 1000mAH Lithium-ion battery. Battery talk time: Over 3hours
NA100: No battery included.
Pick up range: 9.8ft(3m) 360 degrees pick up range.
Max volume: 85dB
Microphone Frequency: 100Hz-8KHz.
Speaker Frequency:100Hz-22KHz.
Signal processing: Adaptive echo canceller, noise reduction, automatic Gain Control. 

Computer environment:
Windows 10 (64bit/32bit), Windows (8.1 * 64bit/32bit), Windows 8 (64bit/32bit), Windows 7 (64bit/32bit), Windows Vista SP1 (32bit), Windows XP SP2 (32bit), Windows 2000 SP4, Mac OS X 10.5 (only equipped with Intel processor machine), Linux, Android OS.
Dimensions/Weight: (L*W*H) 13.5*13.5*3 cm / 300g.
What's in the box: Speakerphone, USB Cable(1.8m), manual.