Convenient and 3 in 1: This digital oscilloscope, electronic component tester, and PWM generator function, combined into one. The oscilloscope has a realtime sampling rate and a bandwidth of 500 kHz. Voltage up to 400V can be measured. TFT Screen: The oscilloscope is powered by a built in 1500 mA battery, which will be fully charged in 12 hours via a 5V 2A adapter and can operate for 4 hours (green indicator for completion/red indicator for charging). The digital handheld pocket oscilloscope and transistor tester is designed with a high resolution 2.4 inch TFT screen with adjusting backlight. Better reading experience and easy to use. Sine Waveform Frequency Output: The generator has 5 built in basic waveforms, sine waveform frequency output 110KHz 03.3V 50%, vertical sensitivity 10mV to 10V , horizontal time base range 1us10s, more waveform data can be obtained per unit time, thus making the waveform more accurate. Multi Interface Screen Display: The oscilloscope can test different functions and support multi interface screen display. With keypad design, it is more convenient to operate and select different test function modes. Portable Mini Oscilloscope: Pocket oscilloscope is an Assembled finished Machine, lightweight and easy to carry, it can be used directly to avoid assembling welding process problems and greatly saves the assembly time.