Features: With 1 key AUTO setting of all parameters, it can quick measure waveform, Improve efficiency. Long press the AUTO button to quickly calibrate. This portable oscilloscope is lightweight and easy to carry. It can be used directly and avoids assembly and welding problems. This oscilloscope is suitable for maintenance industry, meeting daily testing needs. This handheld oscilloscope has 2.5MS/s sampling rate and 200Khz bandwidth. The probes can measuring up to 800VPP, which is equivalent to 280VAC. It can measure voltages up to ±400V. With full function of auto, normal and single, this oscilloscope can be used freely for both periodic analogs signals and non periodic digital signals. With 2.8inch screen with a resolution of 320x240, the Type C port supports data transmission and charging. It supports to directly update firmware. With built in 1000mAh high quality battery, it can be used continuously for about 4 hours after full charged. It comes with a type c charging cable, which can be used while charging. Specifications: Sampling Rate: 2.5MS/s Bandwidth: 200Khz Display: 2.8 inches / PPI: 320×240 Battery Capacity: 1000mAh Calibration Square Wave:Duty cycle: 50% Voltage Range: X1:±40V( Vpp: 80V) / X10:±400V( Vpp: 800V) Mode: Auto/Normal/Single Size: Approx. 12.5x8.5x4cm/4.92x3.35x1.57in Package Includes: 1x Oscilloscope Host 1x Type-C Data Cable 1x Common Probes 1x High Voltage Probes 1x Adapter 1x Instruction note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.