Sinometer UT61C Auto-ranging AC/DC Digital Multimeter with RS232 PC Interface Fully featured auto-ranging DMM with RS232 PC interface for easy data logging & recording Back-lit LCD screen with 40-segment analog bar Date hold + Max/Min + relative measurement (except frequency & duty cycle) AC/DC Volts, Amps, Resistance, Capacitance, Diode, Transistor, Continuity, Frequency & Temperature 30 days money back guarantee and 1 year limited warranty