Features:  It is a full-featured, practical, cost-effective handheld oscilloscope.  500M real-time sampling rate, 110MHz analog bandwidth.  In addition to all the functions of a conventional handheld oscilloscope, it has added a one-button fast auto function on this basis, so you can grasp the waveform as easily as a desktop computer.  Fast waveform storage function, can store up to 81 pictures.  Reference waveform, you can pause to save the previous frame waveform to the screen at any time, and you can compare it with the currently refreshed waveform.  Afterglow and scroll modes make it easier to detect and record waveforms.  Built-in 3000mAh rechargeable battery, can work continuously for more than 10 hours when fully charged.  The body is equipped with a fine quality silicone sleeve, which is non-slip and anti-fall.  The joystick replaces the previous direction button, which is simpler and more efficient to operate.  The oscilloscope provides powerful waveform file management capabilities. It supports thumbnail file browsing, viewing, viewing of measurement parameters, page turning, and deletion. It is just like the picture browser on a mobile phone. File management provides a very convenient platform, and its flexibility is much higher than that of ordinary desktop oscilloscopes.  After pressing the "Auto" key, the oscilloscope will automatically measure the amplitude and frequency of the waveform, and automatically adjust the horizontal and vertical scales to display the waveform in the middle of the screen.  Measurement options: frequency, peak-to-peak, positive duty cycle, amplitude, positive amplitude, negative amplitude, maximum, minimum, period, root mean square, average, positive pulse width, negative pulse width, negative duty cycle.    Specifications:  Main material: ABS  Color: black+blue  Battery: 1 * lithium battery, 3000mAh (included)  Number of channels: 1  Screen size: 2.4 inches  Screen resolution: 320*240  Analog bandwidth: 110M  Sampling rate: 500M  Rise time: <3ns  Storage depth: 240KB  Time base range: 5ns-10s  Vertical sensitivity: 10mv/div-10v/div  Trigger mode: auto / normal  Trigger type: rising / falling  Display mode: YT / scroll  Afterglow time: none / 1s / ∞  Charging method: 5V / 800mA  Voltage measurement range: ±40V (x1 file);±400V (x10 file)  Channel coupling: AC / DC  One-button automatic: stand by  Waveform measurement: 14 types  Measurement accuracy: ±2%  Reference waveform: stand by  Waveform save: stand by  Frequency accuracy: ±0.01%  Input resistance: 1MΩ  Single trigger: stand by  50% (back to middle): stand by  Operation method: button + joystick  Waveform analysis: support drag / expand after stopping  Item size: 114 * 74 * 33mm / 4.5 * 2.9 * 1.3in  Item weight: 300g / 10.6ounce  Package size: 134 * 94 * 56mm / 5.3 * 3.7 * 2.2in  Package weight: 400g / 0.