Sennheiser IE 100 PRO Wireless Monitoring Earphone - Black with built-in mic for your mobile phone, PC or tablet. Passive noise cancelling & 10hours battery life

Sound quality: neutral sound, a bit on higher side. Low is very good and clear. Sound signature is really of my taste. Crystal clear, crisp, on point sound. Most noticeable attribute is sound stage. Very wide spacious sound stage.Build quality: very comfortable and light. Best fit in ear. But feels delicate specially on the point of connectors.Connector: the connector is not typical ‘MMCX’ type. It is Sennheiser exclusive connector. This is the only drawback i have found. A universal connector helps in having choices over buying different quality and of different length of cable. Though the cable quality is very good. Soft and durable.Bluetooth connector: Bluetooth connector is just for casual listening. I noticed a huge difference in sound stage while shifting from wired to Bluetooth connector. With Bluetooth connector it sounds just like any other Bluetooth earbuds half the price. So I never use Bluetooth. It is just for ‘just in case’ type of purpose.Overall I found it to be really good sounding and best fit among all other earphones in my collection. I have bought it in 8.7k with Bluetooth adapter which is a great deal.** The wireless version is not just wireless. It comes with both 'Bluetooth adapter' and '3.5mm cable'. So wireless version is basically the wired version along with an additional Bluetooth adapter. See the box contains in my uploaded picture.

I love these IEMs. Probably will be nitpicking things that are stopping it from being the greatest pair of affordable IEMs ever created.Cons:1) It looks archaic. The two dangling modules look ugly. I wish Sennheiser comes up with better looking blutooth modules in the next version that wraps around the ear and doesn't have flimsy wires like the current one. No complaint with 3.5 mm wires though.2) A little more range. I like to have the freedom of walking around different rooms while forgetting about the range of a BT earphone. So when I go a little further than expected, the earphones start crackling a bit. A little more range wouldn't hurt anyone.3) I've noticed my right bud has a noticeable driver flex. Not annoying. But I notice it from time to time.4) Poorly recorded music sounds poor. Not a con, but the IEMs do justice with clarity. Any unwanted distortions become very apparent.5) I use it with Windows OS as well. It's an absolute nightmare with windows. Connectivity issues, voice lag, poor quality while calling. It's a whole package. All of it could be solved if Sennheiser made a native control app for windows. Plus, if it also had an Equalizer.Pros:1) They sound good. Good bass, decent mids and treble. The stock tuning sounds great. Though I have noticed distortions while using tweaking the frequencies to the extreme ends on an Equalizer, but nothing too serious.2) They are cheap if you manage to get a good deal on them.3) I love the interchangebility of wires. I edit music with wires and casually listen to it without them. It also means that I don't have to throw the pair when the wires go bad. I can simply get new connectors which is cheaper in the long run.4) They're mad comfortable. I had a pair of galaxy buds, this made them look like ear dumbbells. I can wear this for hours with 0 discomfort once I get the fitting right.Verdict:Sound: 8/10Value for money: 8/10Comfort: 9/10Appearance: 7/10

Nice fit and sound

It sounds distorted and patchy. Not at all an original Sennheiser product. Why should I spend more than an Apple Airpod, for a bad experience?

Fantastic sound and qualitative build quality

I'm writing this review again because my first 3☆ review got deleted by either Amaz0n or S3ller, maybe because I used bad word or said too much?So this time I'll make this review simple & writing it after 2 months usage.first let me makes you understand meaning of Audiophile or what audience these IEMs are for.IEMs are for those who love to listen original Natural sounds Music coming out of Studios & we call them Audiophiles or for those who work at Audio Studios & create Music without boosting any level of any Instrument they recorded in big Halls or Operas.as for us Music lovers who only love to listen bassheads, Rock or some of us do love Natural sound music but also want some punchiness & little boost increase in bass? so let me tell you these IEMs aren't for us, we're good with our 800 - 5k Earphones like old Sennheiser CX series & other brands' good earphones.as I said in Title "not for Punchy, Bass & Bollywood style Music lovers"it because this IEM has not Punchy type feelings nor good Bass like your old CX 180 or CX 275s have, of course it does have far better instrumental sound quality but it still feels behind in Female & Male voice performance when you listen Music or in simple words this IEM do focus more on Instruments than singers' voice, which won't makes your body dance by it's own like Magical sounds of old CX series(don't go for current new series) used to do with their Balanced sound between both singer voice & instruments with punchy bass when they were in stocks plus they were far more cheaper in price than these one.still I could recommend you these IEM only if it's price started from 7k instead of 10 or 13k for Bluetooth version(it because it's range is really low like under two rooms & if you go any far you'll get lag also sounds low too compared to Wired version) & 5.8k for only Wired verison(because wired version has lesser bass than it's Wireless version, also if you'll increase your volume over 80% you'll get near no Bass & for optional con is No Mic because as I said IEMs for Studio work only Not for vacation or outdoors).so in shortif you're Natural Music listeners without caring about Bass then go for these IEMsif you're like me who love Natural & balanced punchy Bass Music(for ex: CX 180 & 275s) then you shouldn't go for these IEM, also stay away every type of IEMs&if you're one of those who do wanna try IEM for first time but also limit with budget then I'll suggest you go for those under 3k Chinese IEMs instead of wasting 10k so you won't had to regret later as I'm regretting.(Suggestion for Sennh3is3r company please reduce the size of Medium size buds they kinda uncomfy & also please bring back Old CX Series otherwise New CX Series only creating E-Waste in Amaz0n as you can see how many Renewed version of current CX Series about to touch Fresh version, also it's hurts us Fans' hearts too, so please bring Old CX series back🙏)