PC USB 2CH 20M Digital Oscilloscope Spectrum analyzer DDS Signal Generator Sweep Oscilloscope: 2CH, Bandwidth 20MHz, Buffer Size 1MB/CH, Max sample 48MS/s Spectrum analyzers: 2CH, Bandwidth 20MHz. Algorithm:FFT(18 windows),correlation,power spectrum Data recorder: 2CH, Impedance 1M ohm 25pF, Coupling AC/DC DDS: Wave:Sine,Square(Duty circle variable),Triangle,Up Sawtooth,Down Sawtooth. Sweep type: Linear S Compatible: XP,Win7(32),Win7(64),Win8(32),Win8(64),Win10(32), Win10(64); USB2.0 and above version