Sennheiser CX 400BT True Wireless Earbudsÿ- Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, White - Tested with Digital Stethoscopes

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• Audio quality is our top priority: Experience great sound with a 7 millimeter dynamic driver and a wide range of Bluetooth codec support
• Long battery life (20 hours) and comfortable wearing: Get up to 20 hours of music playtime with one charge - The ergonomic design? offers optimal comfort and secure fit with 4 ear adapter sizes??
• Personalize to your everday needs: Fully adaptable controls for music, calls and voice assistant? - Built-in audio equalizer? adapts the sound to your personal preferences
• Full digital control with our app: Our Smart Control app for iOS / Android? allows all of the earphone functionalities to be modified to your personal choice
• Enjoy outstanding sound quality no matter your mobile device or your surroundings with our wide range of audio codec support including AAC, aptX, SBC and passive Noise Cancelling
• Sennheiser uses decades of expertise to drive the world of audio technology forward with every product - for new, unique sound experiences
• Included components: CX 400BT True Wireless, Charging case, USB-C charging cable, Silicone ear adapter sets (in size XS/S/M/L)

SENNHEISER CX 400BT True Wireless Earbuds
These true wireless headphones are powered by premium dynamic driver technology to ensure pure listening pleasure. The built-in equalizer and customizable touch control make the earphones simple to use and adapt to your daily hearing needs and habits. Use the quick charge functionality for fast reuse: 10min charging for 1 hour of music playtime?, after 60min charging you already have 5 hours. For all-day listening, the CX 400BT True Wireless has a 7-hour battery life with up to 20 hours available when recharging on-the-go with the charging case. The ergonomically formed earbuds in multiple sizes make sure you have the right fit and comfort for your ears for all-day listening.

Product features:
+ Automatic on/off functionality
+ Up to 20 hours of music playtime
+ Approx. 1.5 hours charging time
+ Bluetooth 5.1?
+ Wide range of Bluetooth audio codec support (SBC, AAC & aptX codecs support)
+ Customizable ?touch controls
Wireless headphones from SENNHEISER
SENNHEISER offers a wide range of wireless headphones models, catering to different needs - from IR-stereo TV listening systems to audiophile digital home systems, to luxurious Bluetooth travel headsets. No wire will come between you and your sound experience.

Customer Review - Verified Purchase

Best sounding earbuds I've used. Wide, really wide, soundstage, great detail, solid, clean bass. Smooth, satisfying mids. The controls are well designed and pairing was easy. Touch earbud touchpad for 3 seconds and it says "pairing" so you know it's pairing. No putting it back into the case and taking them out again multiple times to get them to pair again like with some earbuds. Comfortable enough, though it could be better. The squarish shape isn't the best fitting for ears. Would've liked to see the case have 4 LEDs for power level instead of a single LED with multiple colors. With such a tiny LED, the color is not that easy to make out. Even cheap $30 BT earbuds have multiple LEDs so I'm not sure why Sennheiser couldn't have them here too. The Sennheiser Smart Control app is easy to use and works well. It allows you to tweak the EQ, see the battery level of the earbuds and update firmware of the earbuds.

The overall package (the case, the earbuds exterior, the box it came in) is very basic. If you're looking for something fancy and nice looking to impress your friends, these will not. The earbuds themselves are not sexy looking or stylish or flush fitting in your ear, they are on the bigger side and stick out of your ears a bit. If you're vain and care about that, then these are probably not for you. No ANC, obviously, or ambient sound pass through so if those features are requirements, you should look elsewhere. No sweat/water resistance either, so not so good for working out or using in the rain.

But if you don't want yet another muddled, overly bass-boosted, small soundstage TWS, if really excellent sound quality is way up there in importance and you're looking for a convenient, highly portable way to really enjoy your music listening experience for a not-cheap-but-not-super-expensive-either price, these fit the bill very nicely.

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