Features: This device have three functions: oscilloscope, multimeter and signal generator. The oscilloscope adopts FPGA+MCU+ADC hardware architecture. It have a sampling rate of 250MS, analogs bandwidth of 50Mhz, a builtin highly voltages protections module, and supports a maximums peakings voltages measurement of ±400V; supports waveforms screenshots. Save and view to facilitate secondary analysis. The multimeter function is 4 and a half digital and 19999points of trueRMS, supporting direct current and alternating current voltages and current measurements, capacitance, resistance. Set up a DDSfunction signal generator, which can output 12kinds of function signal. The maximums output of signal generator is 10MHz, with a step of 1Hz; output frequency, amplitudes, and duty cycle. It use 4.3inch 480x272 resolution Touchings display and a builtin 4000mAh rechargeable lithiums battery with a standbys time of up to 4hours. With small size. Specifications: Material:ABS Oscilloscope: Channel：Double channel,Analogs bandwidth：50MHz, Sample rate：250MSa,Storage depth：Up to 64kByte,Input mpedance：1MΩ Multimeter: voltages:DC1.9999V/19.999V/199.99V/1000.0V,AC1.9999V/19.999V/199.99V/750.0V,Current:19.999mA/199.99mA/1.9999A/9.999A,Resistance：19.999MΩ/1.9999MΩ/199.99KΩ/19.999KΩ/1.9999KΩ/199.99Ω,Temperature：(-55~1300℃)/(-67~2372℉) Diode：Yes, Continuitytest：Yes Signal Generator Channel：Single channel, Frequency：0-10MHz（Sinewave: 10MHz, otherwaveforms 5MHz）,Amplitudes：0.1-3.0V,Squarewave duty cycle0-100% Package Includes: 1Piece Oscilloscope Multimeter Signal Generator note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.