MIC-01
100 sqft range, RCA plug, Micro-chip design, low noise, high-fidelity, Operating-voltage:6-12VDC, Frequency response:100-5500Hz, Have power & audio link interface
MIC-03
492 sqft range, Rectangular enclosure, Audio Output: RCA Female, Hight sensitivity: 200mA/ubar, Work current :5 mA-60mA, Work Voltage:4-14V, Frequency:200-6000HZ, Max output Voltage:5V-upp