Dynamic noise-canceling microphone to reduce the background noise effectively and to enhance communication quality, in the 115dB environment, the two persons still can achieve a clear call (in accordance with the national test certificate issued by the authority)

On board DC power indicator for easy maintenance

Modularized components for easy installation and maintenance.

Metal button, feel comfortable.

One button used to adjust volume

Key parameter:

Protection Grade:IP5X

Input level&output level:1.5Vrms

AGC：58dB normal ,(40-68dB adjustable)

Frequency response：250-7500Hz(±1.5dB)

Noise-canceling performance：run in the115dB environment condition

Noise immunity:SNR is 16:1 @ 120dB

Transmitter:10Ω,dynamical anti-noise

Headphone:130Ω,dynamical anti-noise

Degree of distortion:1% (1000Hz)

Adjustable item:Gain and volume of transmitter,volume of loudspeaker, sidetone

Power supply：AC220V,50HZ,

Zero signal power：2.5W

Max. signal power：30W

Phone cable length：30CM, Max.1.5M

Air pressure: 86～106KPa

Temperature -:40℃~+60℃

Humidity: 95%RH(+25℃)