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Nice toy, Vpp measurements within 10% as stated on the user manual. At 80 Mhz The 300 mV signal is not activated and therefore is not displayed, the problem is the probe, without the probe I have correctly displayed a waveform of 115 Mhz. Below 80 Mhz the wave is displayed correctly but the measurements in Vpp are not very accurate, perhaps because the probe is declared on the user manual as 100 Mhz (with other probe is ok) but below 50 Mhz the Vpp is within the declared tolerance. Useful for on-the-fly measurements. The frequency is read correctly. The supplied probe has no label and the model and frequency are unknown. All in all a good product.
It is good enough for the price range, but wouldn't recommend using it for precise measurement. This one is a good starting point for people who just started at electronics and hobbyists that doesn't care too much about precision. Posted 02/27/2021 and arrived at 03/05/2021.