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5-in-1 Oscilloscope Plus Function Generator – Debugging Tool with Scoping, DC Reference, Spectrum, PWM Signal, Function Generator – Type C USB Connection Rechargeble Battery | EIM Technology ZOOLARK: Amazon.com: Industrial & Scientific
BitScope Micro Model 5 | A tiny USB Mixed Signal Oscilloscope
Hantek DSO4102C Digital Multimeter Oscilloscope USB 100MHz 2 Channels LCD Display Waveform Generator: Amazon.com: Industrial & Scientific