... : 1,Measuring resistance measuring speed, distance, measured. 2,System of automatic continuous sampling, and never missed any wave - ... distance:Smax is 40 km Smin no testing blind spots.System error : full scale absolute error : ± 5 m ... compressor, Pan, computing and real-time expert guidanceWorking power supply : AC / DC power supply AC 220V ± 10 50Hz DC 24V internal batteryOperation environment ...