[LearnElectronics] was skeptical of the 100 MHz claim and it looks like it is more like a 30 MHz analog bandwidth. Despite that, it does seem like a pretty capable 30 MHz scope in a very handy form factor and a very cheap price: as little as $120 or so, depending on where you shop.

via Tablet Oscilloscope Claims 100 MHz, But Is It? — Hackaday

https://www.youtube.com/watch?time_continue=360&v=xXOjb54F9JE&feature=emb_title