Signstek UNI-T UT81B Handheld LCD Digital Scopemeter Oscilloscope Multimeter 60mm mono LCD display (160x160 resolution)AC/DC voltage and current measurement Automatic mode: Automatic Sleep Mode, Automatic Power Off, Automatic Range 10 x screen and setup memories. Continuity buzzer and diode test Resistance, capacitance and frequency measurement Display: Back light Display, Full Icons Display Signstek UT81B is handheld digital oscilloscope multimeters that has embedded digital control technology design and set digital storage oscilloscope and digital multimeter in one. Oscilloscope measurement mode is a complete intelligent measurement system, including signal input, data processing, auto search, waveform storage and transfer; multimeter measurement mode measures AC/DC voltage and current, resistance, forward voltage drop of diode, continuity, frequency, duty ratio and capacitance. - DC to 8MHz Oscilloscope Bandwidth - Trigger Types : Free Run / Normal / Single Shot - Up to 40 MS/s Real-time Sampling per Input - With maximum reading of 3999 &amp; updates 2 ~ 3 times/second - Double Insulated and Protected against Overcharges - True RMS Multimeter for Voltage, Current, Resistance, Capacitance, Duty Cycle &amp; Diode test - DIGITAL AUTOMATION - Data Hold and Run Mode, also Relative Mode - Relative Mode - Full Overload Protection - Automatic Polarity Indication - Automatic Over-range Indication - Automatic Low Battery Indication DC Voltage: 400mV/4V/40V/400V/1000V; Accuracy: (0.8%+8) AC Voltage: 4V/40V/400V/750V; Accuracy: (1%+15) DC Current: 400uA/4000uA/40mA/400mA/4A/10A; Accuracy: (1%+8) AC Current:400uA/4000uA/40mA/400mA/4A/10A; Accuracy: (1.5%+8) Resistance: 400 ohm/4K ohm/40K ohm/400K ohm/4M ohm/40M ohm; Accuracy: (1%+5) Capacitance: 40nF/400nF/4uF/40uF/100uF; Accuracy: (3%+8) Frequency: 10Hz~10MHz Input Sensitivity: 20mV/div-500V/div Horizontal Accuracy: (0.01%+1) Timebase Range: 100ns/div-5s/div (1-2-5) Bandwidth: 8MHz Display Resolution: 160X160 Real-Time Sample Rate: 40MSa/s Duty Cycle: 0.1%~99.9% Display 160x160 Monochrome Trigger Types Free Run / Normal / Single Shot Memory 10 screens and setups Max.Display 3999 Power: 1.5V BatteriesR6X 4 LCD Size: 60mm X 60 mm Product Net Weight: 498g Product Size: 200mm X 100mm X 48mm 1 x Multimeter 2 x Test Lead 1 x USB Interface Cable 1 x PC Software CD 1 x adapter 3 x probe 1 x Carrying Bag 1 x User Manual