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Sony WI-XB400 Extra Bass Wireless In-Ear Headphones (Blue) with Knox Noise Isolating Memory Foam and Silicone Ear Tips

  • mfr: WIXB400L_K2
  • SKU: WIXB400L-KT2
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Product highlights

  • Extra Bass for deep, punchy sound
  • Wireless streaming via Bluetooth
  • Quick charge and up to 15 hours of playback
  • Flexible and lightweight neckband
  • Magnetic buds for easy carrying
  • Button operation and hands-free calling
  • Voice-assistant compatible

Sony WI-XB400 Extra Bass Wireless In-Ear Headphones (Blue) with Knox Noise Isolating Memory Foam and Silicone Ear Tips

Knox Gear Noise Isolating Memory Foam Ear Tips (6-Pack) and Silicone Ear Tips (6-Pack)

Up your listening comfort level and fit with the Knox Gear Noise Isolating Memory Foam Ear Tips (6-Pack) and Silicone Ear Tips (6-Pack). These tips will fit most major earbud brands and come in different sizes so you can choose the best pair for your ears.

Anti-Dust and Durable

Upgrade your earbuds with these premium replacement ear tips. They keep earwax, debris and sweat out of your earphone's nozzle, protecting your earphones and keeping the sound path open. These ear tips are long-lasting, feature a slow rebound and are not easy to break.

Enhanced Comfort

The super-soft memory foam in these ear tips is 30 times softer, bringing extra comfort to your ears. The box includes 6 pairs of ear tips so that you can customize the fit to your liking.


Configuration Core
Material Silicone
Color Black


Customer Questions
No Questions


Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges. 
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days. 
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact [email protected] with your order number and a description of the damage. 
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at [email protected], or send us a message here.  
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead. 
If you ordered a kit, you must return all components and accessories to receive a full refund. 
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund. 
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900. 
Most items can be returned within 30 days for a full refund. Click here to read our full return policy. 

Shipping and Returns

Same Day Shipping

All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

Free Two-Day Shipping

We offer free expedited shipping on thousands of items within the continental USA (this does not include Alaska and Hawaii).

Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews


Sony WI-XB400 Extra Bass Wireless In-Ear Headphones (Blue) with Knox Noise Isolating Memory Foam and Silicone Ear Tips SKU: WIXB400L-KT2

Rated 5 out of 5 by from Reliable, Long Charge, Great Sound [This review was collected as part of a promotion.] The neckband style of my new in-ear headphones is a massive improvement over so many other in-ear options. I especially appreciate that my inner ears don’t get crazy sore after wearing these for only a short period of time; my other in-ear headphones used to smart after only a couple of hours. My new headphones are so much more versatile than my last pair. They are easily portable, and I can even sleep with these in my ears fully charged all night, and I never lose one in the bed! These benefits came in handy while I slept over at my mom’s house a few nights last month. My dad passed away a few months ago, and I know she’s comforted if I stay with her occasionally. However, the guest bedroom at my mom’s house is right next door to her bedroom, and she snores so loud that it sounds like a freight train is crashing through the house from the moment her head hits her pillow and then literally all night until her alarm goes off the next morning! In addition to that nonsense, she sleeps with the television at night and keeps it on a very high volume. My headphones sound so great and work so well that I can officially sleep like a baby despite all that noise! My WI-XB400 EXTRA BASS™ Wireless In-ear Headphones deliver an amazingly autonomous musical experience with the clear sound quality they deliver, and they really do a great job of seriously snubbing outside noise (much to my kids’ annoyance when they try to get my attention if I get lost in a song with these on). These headphones hold their charge reliably for more than 10 hours at a time, and recharging time is remarkably quick.
Date published: 2022-02-01
Rated 4 out of 5 by from Value for money [This review was collected as part of a promotion.] A very decent headphones for its price. I has high bass as promised, great for those who like to hear those beats. However, its fine for other usage, which is acceptable for its range
Date published: 2022-01-22
Rated 3 out of 5 by from Like them except they don't stay in place [This review was collected as part of a promotion.] I've actually gotten to prefer neckbuds over true wireless earbuds because it allows me to take them out and keep them around my neck, which is super useful, especially when traveling. These, however, don't have a solid neckband, and that causes them to slide back and forth around my neck, to the point where they fall off if I'm moving around much. The connection and sound quality are great, but I definitely prefer neckbuds with a solid neckband. They also have USB Type-C which is a huge plus.
Date published: 2021-12-31
Rated 4 out of 5 by from Cool headphones [This review was collected as part of a promotion.] These headphones have a great sound quality. The are made from a thick material that will not break easily. The ear pieces are also small so they are not uncomfortable to wear.
Date published: 2021-12-21
Rated 5 out of 5 by from best sound [This review was collected as part of a promotion.] There are my new favorite wireless in ear headphones. They have a much richer sound than other headphones I've had and they comfortably stay in my ear. They are easily connected to my phone and other devices. They have been durable and a wonderful product.
Date published: 2021-12-15
Rated 5 out of 5 by from Loud enough! [This review was collected as part of a promotion.] It's more than loud enough, and the bass it awesome! You can really feel the music without it being overbearing. The ear buds being connected makes it easier to keep up with. The charge lasts all day for me. Phone calls are clear. I'm happy with them!
Date published: 2021-12-14
Rated 5 out of 5 by from Amazing bass [This review was collected as part of a promotion.] These headphones are great they stay on my ears very nicely. As well as the bass being amazing alot of it love good pair and these are it. I also like the fact that they are easy to use.
Date published: 2021-12-05
Rated 5 out of 5 by from Excellent Headset [This review was collected as part of a promotion.] Great headset that stays in the ear. Wireless don't have to worry about connecting to the source or if your phone has 3.5 jack or not. The sound quality is great and very convenient to use.
Date published: 2021-12-04
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