NOTE:"No Standalone lithium batteries are sold with the product". Excellent Power Management: Ultra-low comprehensive power consumption less than 5W.Powered by 2600mAh*2（3.7V，18650）lithium battery, easy battery replacement. Great Oscilloscope Performance: Max 10000 wfrms/s waveform refresh rate. Dual channels input,100Mhz bandwidth,real-time sampling rate 500MSa/s. Digital Multimeter with True RMS: 20000 counts high-precision professional multimeter Support relative value measurement and measure voltage,currentdiode,capacitance,continuity test and resistance. Different Application: 3.5-inch high resolution,high contrast color LCD display,suitable for outdoor maintenance,rapid on-site measurement, automobile maintenance,power detection,etc.USB Type-C interface,support power bank,support PC software connection. Simplify Operation and Convenient to use: 10mv/div - 10m/div vertical sensitive; auto automatic measuring function; key tone settings, adjustable backlight time, backlight, duration and auto power off time. Digital voltmeter function, Cursor measurement, reference waveform,waveform Storage function. OWON HDS2102 Oscilloscope 2 in 1 100MHz Professional Handheld PC Oscilloscope, 20000 Counts Digital Multimeter 3.5 inch LCD Display Universal Test Instrument (oscilloscope+multimeter)