Feature: 1. Convenient and 3 in 1: This digital oscilloscope, electronic component tester, and PWM signal generator function, combined into one. The oscilloscope has a realtime sampling rate and a bandwidth of 500 kHz. Voltage signals up to 400V can be measured. 2. Identify Device Type: Oscilloscope mode can test the signal waveform of the circuit, while Mos test mode can test various types of transistors, which can identify device type, pin polarity, hFE, on state voltage, junction capacitance, resistance, inductive components, etc. Signal generator mode, you can use sine, pulse, triangular or ramp waveform. 3. Sine Waveform Frequency Output: The signal generator has 5 built in basic waveforms, sine waveform frequency output 1‑10KHz 0‑3.3V 50%, vertical sensitivity 10mV to 10V , horizontal time base range 1us‑10s, more waveform data can be obtained per unit time, thus making the waveform more accurate. 4. TFT Screen: The oscilloscope is powered by a built in 1500 mA battery, which will be fully charged in 1‑2 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. 5. 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. 6. Applicable Items: The oscilloscope supports PC online operation, which is especially suitable for fast pairing of transistors, identification of mixed face mount and wordless components, and initial screening of small batch components. It can automatically identify and measure various transistors, including NPN and PNP transistors, diodes, double diodes, etc. Specification: Item Type: Digital Oscilloscope Material: ABSMain Parameters Of The Machine Model DSO TC3Display 2.4 Inch TFT Color Screen, LED Backlight1 x 803450 1500mah Li Polymers Battery (Shipping With Built In Battery)Charging SpecificationUSB Type CStand SpecificationsOne Piece Foldable Stand Digital Oscilloscope Mode Parameters Realtime Sampling Rate 10MSa/s Analog Bandwidth 500Khz Input Impedance 1MO Coupling Method AC or DC Test Voltage Range ±400V Vertical Sensitivity 10mV-10V Horizontal Time Base Range 1us-10s Trigger Mode Auto, Normal, Single Trigger Type Rising Edge Or Falling Edge Waveform Freeze Yes Automatic Measurement Yes Component Test Mode Parameters Class Range Description Triode β greater than 10 less than 600 Magnification hfe, base emitter voltage Ube, lc/le, collector emitter reverse cutoff current lceo, lces, protection diode forward voltage drop Uf Diode Forward voltage drop