... frequency identifying: 270Hz,1kHz,2kHz 2.Automatic turn-off, time setting range: 5~60mins. Detailed Product DescriptionIt is applicable ... mW,dBm,dBl Automatic range shiftl Automatic turn-off, time setting range: 5~60mins.l Automatic resetl Multi- ... auto frequency identifying: 270Hz,1kHz,2kHzl Data storage function; 1000 groups l PC real-time data monitor functionl Low power alarmTechnical parameters ...