FNIRSI Latest Mini Handheld Digital Oscilloscope DSO 152 

The sine wave in your country's mains is interesting

Glad to see waiting for more content and put my hands on it

Love the geiger counter they make, I really wish they would make it in black, also..a multi band colour display and usb-c radio would be awesome (something similar to the baofeng uv18 pro)

This oscilloscope is good for audio amplification test, for generate the signal and test the output, all in 40hz to 20khz range

If you use your scope like this and touch the bare metal piece of the connector(the side of the scope) you can get a shock from the mains. Guess how i know.

Is the ADC sampling rate high enough?

After 1 year It broken.

200khz is enough for test audio equipment like me. Most of the test that I do is under 200khz.

Can you show the connections correctly please 😊✌🏼

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it is your country AC phase... bad THD

Must be a China issue…

200khz bah!

Devise is not setup correctly, hence the poor sinewave on mains.