Product No.: TEVO-A300 microphone for classroom
Communication: Wired
Use: Conference Microphone
Place of Origin: Guangdong, China (Mainland)
Pickup range: 4M(13ft)
Power supply: USB:5 V DC @ 300 mA Maximun
Built-in microphone: 3
Ectended microphone: no
Max output: 83dB
Noise suppression: Yes
Interface: USB2.0 Full speed interface
Max. Power: About 2.5W
Power supply: USB power supply(5V/500mA)
Radio interference standard: VCCI level B
Operating environment
Temperature: 0 ~ 40 degrees C working humidity: 20 ~ 85% (no frost)
Size: 170(L)x 150(W)x 30(H)mm , 240(L)x170(W)x 45(H)mm (before and after packaging
Weight: 340g/0.52g (before and after packaging)
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)
Accessories: USB cable (2.0m), Manual, Quality Certificate
http://www.tenveo-video-conference.com/conference-speaker-microphone/conference-mic/hd-voice-provides-crystal-clear-sound.html