Sony WI-XB400 is impressive with excellent build, solid music experience and long battery backup. If you are comfortable with not having an IP [waterproof] rating, Sony WI-XB400 has all other things covered and you can go with it.
-Techlo Media(Nov 2019)
A well-balanced signature that will suit both, bass-heads and normal people. Punchy enough for pop, subby enough for hip-hop and warm enough for a fleshy rock track. And given how clean and detailed the WI-XB400 is, the sound profile is suitable for acoustic genres as well. Add to that some decent call clarity, long battery life, and you’ve got a solid pair of wireless earbuds for your daily commute.
-Major HiFi(Sep 2019)
The Sony WI-XB400 have two distinct weak-points, and two distinct strengths. For weaknesses, you’ll find these earbuds are terribly average when it comes to the quality of their construction. Their always-on microphone is always a little tedious at times, but in exchange, it does make the voice assistant features a bit more robust. For strengths, the audio quality is pretty impressive. Especially considering their price.