Fangrui Product Details [premium Material]:plastic Housing Material, Drop Proof And Shockproof. The Printed Circuit Board Adopts High-cost Immersion Gold Process, With High Antioxidant Corrosion Resistance, Stable Working Performance And High Reliability. [3in1 Design With 3.5 Inch Color Display]:this Product Ingeniously Integrates Digital Oscilloscope, Multimeter, And Signal Generator Functions Into One Device. 3.5-inch Color Display, Screen Readings Are Clearer, And The Visual Color Is Richer. Data Visualization Design, The User-friendly Interface Design And Operation Mode, So That Users Do Not Need To Spend A Lot Of Time To Learn To Quickly Get Started, Improve Work Efficiency. [signal Generator]:equipped With A Built-in Signal Generator Function, With Automatic Waveform Measurement And Recognition Function, No Need To Display The Measured Signal Waveform Clearly Without Measured Signal Waveform. [high-precise Multimeter]:high Precise Multimeter With True Rms Measuring Function. Supports The Test Of Dcvoltage, Acvoltage, Dcc