PPS-A All-call Microphone Feature: PPS-A All-call Microphone ●Flexible gooseneck condenser microphone. ●Lock / None Lock PTT button. ●RJ45 terminal connection. Specifications: Performance PPS-A Line Out 1V @600Ω , Balanced, <1% Current Consumption <50mA Frequency Response 100Hz~15kHz, +1/-3dB Speech Filter 315 Hz(-3dB),6dB/octave S/N Ratio MIC >85dB DC Power 24VDC Operation Temperature / Humidity -10°C ~ +45°C @ 95% R.H. (Non-Condensing) Storage Temperature -20°C ~ +70°C Dimensions (W x D x H)mm 108 x 240 x 55 Weight 1kg