UNI-T UT81B Handheld LCD Digital Scopemeter Oscilloscope Multimeter, red+black 60mm mono LCD display (160x160 resolution)AC/DC voltage and current measurement. Automatic mode: Automatic Sleep Mode, Automatic Power Off, Automatic Range; Full Overload Protection, Automatic Polarity Indication, Automatic Over-range Indication, Automatic Low Battery Indication. Continuity buzzer and diode test; Resistance, capacitance and frequency measurement; Display: Back light Display, Full Icons Display. DC to 8MHz Oscilloscope Bandwidth; Up to 40 MS/s Real-time Sampling per Input; With maximum reading of 3999 & updates 2 ~ 3 times/second; Double Insulated and Protected against Overcharges. True RMS Multimeter for Voltage, Current, Resistance, Capacitance, Duty Cycle & Diode test; Digital automation; Data Hold and Run Mode, also Relative Mode.