Wireless headphones, Anker Bluetooth headphones, Slim Lightweight Wireless Soundbuds with Magnetic Connection, IPX4 Water Resistant Sport Headset with Mic, works with iPhone, iPad, Samsung, Nexus, HTC and More I've owned these for about a week and have given them a thorough going over in the gym and in day to day use. I'm hugely impressed at the sound quality these offer at this price point. My reference point is my high end Sennheiser in ear headphones which are twinned with an Oppo HA-2 amp so I'm not a stranger to high quality audio. It also means most of my music is recorded in either lossless or high fidelity AAC format. As these are bluetooth, I've only listened to them using my iPhone 7 as a source. I'm surprised by the comments of some reviewers that these are light in the bass section. I listen to mainly techno / house music and have found these to sound great at the low end. The crucial thing for bass with any in ear headphone is to obtain a good seal with the eartips; these fit my ears fantastically (Anker provide 4 different bud sizes, which helps), meaning I get very good noise isolation and also good bass. A lot of modern headphones are overly bass heavy (in particular, the Beats headphones) and if that's what people are used to they may sound lighter. In my view, though, that's a very good thing. The high end, conversely, is nothing short of impressive. My type of music tends to have most content at the high and low ends of the spectrum and these perform superbly - crisp and precise without being harsh or tinny. To test the midrange, I have listened to some Coldplay and Pearl Jam and (for the price point and given they are wireless) found these to be a very pleasant listen. They are also extremely comfortable, partly because of the soft rubber tips and partly because they are lightweight. You hardly notice them, which is great for the gym. The rubber wings and well-fitting eartips hold the headphones securely in your ears and, perhaps because they are so light, I haven't noticed the usual problem I have with headphones in the gym which is that they slowly work their way out of your ears while running. Other good points is that they are magnetic, so they clip together round your neck when you're not using them, and that they come with both a clip and a small rubber button that allows you to take a bit of length out of the cable to stop it flapping around which you can see in my photo). If I had to suggest improvements, the only thing I would say is that the small plastic block that has the buttons on it is quite large and not quite as sleek as some designs, so it is noticeable (though it didn't detract from their use in any way). However, that may be because it holds a decent size battery to ensure good battery life - as I say I've been using them for a week quite intensively and they are only now needing a charge. I've also made some calls using them and audio quality is very clear. The people I called said that sound was coming through very clearly. I recommend these wholeheartedly to anyone looking for a good quality set of headphones for day to day use - and in fact have already done so to two colleagues, both of whom have bought sets and are very happy. At £20, they are cheap enough to buy a couple of pairs so one can stay in the gym bag and the other can accompany you as a hands free set and headphones for use with your phone. Again, Anker offer astonishingly good build quality with great performance at an excellent price point. I'd also say that my experience of their customer service is that they are extremely good and very helpful. Update following further use: I've now had these for a few months and I remain very impressed indeed by them. I've recommended them to several colleagues and they've been universally well received. They are definitely not light in the bass department. If you are struggling to get good bass, review your choice of earbud and how you are wearing them - they do need to have a good seal, and you may not be using the right size bud or getting them far enough into your ear. Do be careful though!