This is an entry level IEM from noble. the build quality is good. they might appear heavy and bulky in pictures but he are very light weight and their shape allows them to fit in the ear effortlessly. long listening sessions are fatigue free.
the audio quality is entry level at best, their price might suggest they are audiophile grade but they are entry level in all aspects. their bass is boomy and not much resolving. bass over powers the mids. they use balanced armature drivers so one would expect great highs from them but they are mediocre at best. the treble lacks the sparkle and definition. they dont get sibilant but there is definitely some peaking in some high frequencies.
these are hard to recommend to a beginner as there are so many better options at this price point and audiophiles will be left wanting a lot more so not sure who these are intended for.
PS: these were with me for 3 days only for home audition. i am assuming these were well burnt in. if not i am not sure if burn in will improve the sound.