Professional digital oscilloscope with 250MSa/s Max. sampling rate and 30MHz bandwidth. Large 4.3inch Colorful TFT LCD display, easy and clear for reading. Backlight brightness can be adjusted. Data storage with USB interface, 16K per channel storage depth. Triggering modes: Automatic, Normal, Single. Includes time and voltage cursor, peak to peak/duty cycle/frequency/cycle measurement. Rising/falling edge trigger available, which can measure 50Hz to 60MHz. 10 minutes/30 minutes/never mode of auto power off function. Powered by 2 * 18650 3.7V lithium battery(not included), with battery charger for convenient charging. Comes with a protective bag, easy to storage and carry.