We learn from failure and grow in test, happy with the creation and development of headphones. We believe that perseverance makes the impossible possible and we will never stop until we reach our goal -- to create best headphones for our customers.   
Here we sincerely appreciate Mark Webb for his thorough review and honest feedback. As we always say, your support and suggestion motivate us to do better and step further.

"This new pair of Bluetooth in-ear headphones from Jayfi arrived attractively packaged in an upmarket and stylish box robust enough to use for long term storage of the headset. Inside the box along with the headset was a short USB to micro-USB charging cable, two additional earbud sets of different sizes, two additional sets of wings, a soft carry bag and a User Guide. I include a scan of the User Guide in my unboxing video

Build quality seems excellent. The headset earpieces are a bit larger than the norm and seem very well made and clearly much thought has gone into their design. The earbuds sit comfortably in the ear and the soft wings hold the headset firmly in place which makes it ideal for running. The connecting cable has a rubberised feel to it and is thicker and stronger than others I have tried. The in-line control box has raised buttons which are easy to find and identify by feel. The User Guide is well printed, and easy to read in the unlikely event anybody wishes to do so. The two earbuds are magnetic and can be secured together around the neck when not in use.

Turning now to the sound, I would say it is one of the best I have tried for a in-ear headset in this price range. The bass is very audible and quite punchy. Mid range tones are clear and detailed without being sharp or abrasive and the overall sound is pleasant and easy to listen to. I would have liked more bass but that is a commodity hard to find in these sorts of headsets. However, this headset is described as being for sporting use and for that purpose the sound is more than good enough. It supports the new AptX codec which is great although not the codec is not yet widely supported by phones or other similar devices.

Setting the headset up was easy enough thanks to the excellent User Guide which unlike most was in good English, well printed and easy to read and aided by the status prompts to confirm connection and power . It was easy to pair to my Android phone and once paired the connection seems stable, free from drop outs and automatically reconnected after rebooting. This headset is able to pair to two devices and auto connect to either as required.

I made received a call on the headset and both sides of the conversation found it clear and audible. The pause/play button can be used to end or transfers calls in progress.

This is a good sports headset of above average quality with good build quality, stylish design and good sound quality. Currently priced at £26.99 these are not the cheapest on the market but you would be hard pressed to find a better set for less.

The Good
Great price
Good build quality
APTX codec support
Bluetooth 4.1
Clear and detailed sound
Excellent User Guide
Secure and comfortable fit
Grommet protected charging port

The Bad
No hard carry case"

If there is any question, welcome your consultation.

Link to original passage:

https://marcoscucom.wordpress.com/2017/08/17/jayfi-x1-bluetooth-headphones/