... RH822 provides powerful unscheduled data collection and analysis function, include: 1).Time domain waveform, FFT analysis2 ... Lines400,800,1600,3200,6400,12800Time domain sampling1024~32768Window function typeRectangle, Hanning, Hamming, Triangle, Blackman, Kaiser ... 65536color, with backlightBatteryRechargeable Li-ion battery, working Time (Continuous) >8 Hours; charging time: 4 HoursTemperature Range(- ...