Sinometer Bench Top M9803R True RMS Digital Multimeter With RS232C standard Interface&iexcl;&shy; Digital and analog display, 3999 counts and 42 segments bar graph, digit is 18mm high RS232 Computer Connected Multimeter Auto-range and manual range,Data hold, MAX/MIN relative measurement Storage data display/recall RS232C standard interface 1 Year USA warranty, 30 Days Money Back