The UT803 has auto range and manual range options with maximum reading 5999 and 3 5/6 digits which has a unique outlook design, all the conventional features including DC/AC voltage, current, resistance, diode, continuity test, capacitance, temperature 0C and 0F, transistor, max/min, data hold, low battery display, sleep mode, RS232C and USB standard serial port for easy connection with computer to realize macro recording and monitoring and capture of transient dynamic data, displaying change of waveform during the measurement, providing data and evidence to engineering technicians for scientific research.