Volmate Auto/Manual Range Auto-off Digital Multimeter Voltmeter Ammeter Ohmmeter with Non-contact Voltage Detector Test AC/DC voltage and current,resistance,capacitance; Check frequency,frequency response,duty ratio; Test diode,triode,EF probe,continuity buzzer Featues Data Hold, Relative Measurement, Max/Min Reading function Auto-ranging scales make electronic measurements much easier and a breeze Comes with a super large backl-lit LCD display which is visible in low light Automatically enters sleep mode after 30 minutes of inactivity of rotary switch and buttons for saving power