... extended length : 2.3m5,WIth up/ down button on the top for radio frequency turning 6, OEM acceptable parameter.B Microphone microphones ... axes.Temperature cycle test Exposure at -10°C-- 55°C for 1 hour, 2cycles, frequency response, sensitivity shall be within ... Humidity testAfter exposure at 40°Cand 90-95% relative humidity for 48 hours, frequency response, sensitivity shall be within specifications( ...