Sinometer DT830B 20-Range Pocket digital multimeter with AC DC Voltage,Handyman's Must-Black Digital LCD Multimeter Voltmeter Ammeter Ohmmeter, with diode and transistor test function. Can be used to test AC/DC voltage, current and resistance.Large LCD display screen design for easy test It is really a perfect addition to the tool set of any electrician or handyman It is also an ideal teaching instrument for students One Year Sinometer &nbsp;USA Limited Warannty