Sennheiser CX 400BT True Wireless Earbuds - Bluetooth in-Ear Headphones for Music and Calls - with Long-Lasting Battery Life and Customizable Touch Controls, White

Sennheiser

  • $ 199.95

Sennheiser CX 400 BT
True wireless in-ear Bluetooth® headphones (White)

The Sennheiser CX 400BT True Wireless in-ear headphones are two individual ear buds with no connecting wires. They connect to your smartphone or tablet (and to each other) via Bluetooth. Four pairs of silicone ear tips (XS, S, M, L) are included for a comfortable fit. The CX 400BT headphones come with a charging case for storage, and for recharging the batteries.

Drivers: The CX 400BT features 7mm dynamic drivers that delivers high-fidelity sound with clear treble, natural midrange, and deep bass. You can tailor the sound using the equalizer found in the Sennheiser Smart Control app, available for iOS and Android devices.

Bluetooth 5.1: The CX 400BT headphones feature Bluetooth version 5.1 which pairs to your phone or audio device in seconds. You can make and receive phone calls and stream audio wirelessly in a range of up to 33' (10 meters), depending upon environmental conditions. The headphones have a maximum of 10mW of output power, and have the following profiles: Headset Profile (HSP), Hands-Free Profile (HFP), Audio/Video Remote Control Profile (AVRCP), and Advanced Audio Distribution Profile (A2DP). If your audio source supports aptX or AAC, music is automatically played in high audio quality. Otherwise, the headphones will play in standard audio quality (SBC).

Product highlights:

  • 100% wire-free headphones
  • No connecting cord between left and right earbuds
  • 7mm dynamic drivers for detailed sound across a wide frequency range
  • Spacious soundstage with precise imaging Bluetooth version 5.1 for wireless music listening and phone calls
  • AptX® and AAC decoding provides high-quality music streaming from compatible devices
  • AptX Low Latency decoding helps sync audio and video on compatible devices
  • Free Sennheiser Smart Control app for Apple® and Android
  • Carrying case banks up to 13-1/2 hours of power to wirelessly recharge headphones
  • USB-C cable included for charging caseincludes 4 sizes of silicone ear tips for a customized, comfortable fit
  • Touch controls on each earbud let you answer calls and control music
  • Access Siri or Google Assistant voice controls assistants from your phone
  • Frequency response: 5-21,000 Hz
  • Sensitivity: 107 dB
  • Weight: 0.42 ounces (both earbuds)
  • Warranty: 2 years
  • Our 30-day money-back guarantee
  • MFR # 508900

Responsive touch controls
The earbuds turned on automatically when I put them in, and paired up immediately to my phone when it was in Bluetooth mode. From there, you can control music and calls by touching or tapping either earbud. It took me a few tries to learn everything, but it became second nature rather quickly.

Plus the controls are snappy, and the touch pad is not as sensitive or finicky as it is in some other small earbuds. I could adjust the fit without accidentally pausing music or skipping tracks. Yet, when I wanted to change the volume or activate Google Assistant, the controls were intuitive and responsive.

Charging case banks hours of power
The ultra-light earbuds arrive packed in a compact charging case. It's a little taller than the case that comes with the Momentum TW 2s, and there's no designer fabric lining. Instead, this case is lightweight, functional hard plastic — small enough to pocket, but durable enough to drop in a bag.

You get about six and a half hours of listening on a single charge. And the case banks enough power to recharge the earbuds twice while you're on the move. Plus you can pack it neatly, with no worries about pulling out a mess of tangled wires when you're ready to use the earbuds.