So optically, the E300 do a lot. The red, 125cm long "Triangle" cable not only looks chic, it also looks very stable and simply rolls up. You won't have a mess of cables with the E300. The driver unit of the E300 is 9mm tall and uses a high quality, copper-clad aluminum coil (CCAW). The 3.5mm jack plug of the E300 is gold-plated. Please note that the end of the plug is also triangular in shape. This shape is not compatible with every smartphone case!
Here is my personal sense of sound to the Mrice E300. When I put the in-ears into my smartphone for the first time, I noticed the slight background noise. It was not necessarily serious now, but it was still there somehow. When listening to music with the E300, the inherent noise naturally ceases. Also you have to pay attention, in which price range the E300 play. I'm really used to something worse.
When I heard a few songs, querbeet, I felt the sound of the E300 as very clear and neutral. Depths, mids and heights are in line. Basses are there, but not nearly as strong as other In-Ears that I've already heard.
With the E300 you can really hear every genre of music.