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Sennheiser SPORT True Wireless In-ear Bluetooth® headphones

Item # 143CX200TW

Sweatproof, wire-free sports earbuds with Sennheiser's sonic chops.

Sweatproof, wire-free sports earbuds with Sennheiser's sonic chops.

Item # 143CX200TW

In stock

About the Sennheiser SPORT True Wireless

Jeff Miller

Serious sound for no-nonsense workouts

Sennheiser is known for their distinct, well-balanced sound — and making headphones for almost every listening situation. The SPORT true wireless earbuds keep you moving in rhythm with their 7mm "TrueResponse" drivers. These wire-free, sweatproof earbuds feature ear fins that keep them in place while you run and work out.
Man wearing Sennheiser SPORT earbuds.

The Sennheiser SPORT true wireless earbuds give you touch control over music and calls.

Serious sound for no-nonsense workouts

Sennheiser is known for their distinct, well-balanced sound — and making headphones for almost every listening situation. The SPORT true wireless earbuds keep you moving in rhythm with their 7mm "TrueResponse" drivers. These wire-free, sweatproof earbuds feature ear fins that keep them in place while you run and work out.

Music plays wirelessly from your phone, and the sound is Sennheiser smooth. They deliver clear, detailed mids and highs — along with powerful, controlled bass.

Secure, stable fit for running and training

These earbuds slip right into place with a slight twist and are designed to keep stable while you move. Sennheiser includes three sizes of silicone ear tips — plus four sizes of fins — for finding the right fit. That helps for comfort and also ensures you have a tight seal for proper imaging and strong bass punch.

Charging case banks hours of power

The ultra-light earbuds arrive packed in a compact charging case. It's lightweight, functional hard plastic — small enough to pocket, but durable enough to drop in a bag. You get about nine hours of listening on a single charge, and the case banks enough power to recharge the earbuds twice while you're on the move.


Product highlights:

  • 100% wire-free headphones
    • no connecting cord between left and right earbuds
  • "TrueResponse" 7mm dynamic driver in each earbud
    • clear, cohesive sound with strong, controlled bass
  • durable, IP54 water-resistant design
Wireless audio:
  • Bluetooth version 5.2 for wireless music listening and phone calls
    • aptX® and AAC decoding provides high-quality music streaming from compatible devices
  • free Sennheiser Smart Control app for Apple® and Android™ allows you to adjust settings and customize the sound
    • "Bass Boost" sound preset for deeper low-end emphasis
Battery and charging info:
  • built-in rechargeable batteries offers 9 hours of listening
  • carrying case banks up to 18 hours of power to wirelessly recharge headphones
  • USB-A to USB-C cable included for charging case
General info and specs:
  • includes 3 sizes of silicone ear tips for a customized, comfortable fit
    • 4 sizes of ear fins to further secure earbuds while you move
  • touch controls on each earbud let you answer calls and control music
    • access Siri or Google Assistant voice controls assistants from your phone
  • beam-forming dual-microphone system for clear phone calls
  • frequency response: 5-21,000 Hz
  • weight: 0.46 ounces (both earbuds)
  • warranty: 2 years
  • MFR # 509299

What's in the box:

  • Left and right true wireless earbuds (black)
  • Charging case (black)
  • 3 Pairs of open ear tips (1 pair installed)
  • 3 Pairs of closed ear tips
  • 4 pairs of ear fins (1 pair installed)
  • 10" USB charging cable (Type A USB on one end and USB-C on other end)
  • Lanyard
  • Quick Guide
  • Safety Instructions
  • Focus & Aware feature card
  • Compliance Information

Customer reviews for Sennheiser SPORT True Wireless

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Average review:

4.5 out of 5 stars
27 reviews

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More details on the Sennheiser SPORT True Wireless

Mark G.

Features & specs

Fit Style True Wireless
Earcup Type Closed
Earcup Width x Height 0.737" x 0.885"
Noise-canceling No
Bluetooth Yes
Bluetooth Version 5.2
Single-earbud Operation Yes
Mic For Taking Calls Yes
Voice Assistant Access
Amazon Alexa No
Google Assistant Yes
Siri Yes
3.5mm No
1/4" No
Lightning No
4.4mm balanced No
XLR4 balanced No
2.5mm No
Other None
Frequency Response 5-21k Hz
Sensitivity N/A dB
Impedance N/A
Weight 0.42 ounces
Cord Length N/A
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Overview: The Sennheiser SPORT True Wireless in-ear headphones (CX200TW1) are two individual ear buds with no connecting wires. They connect to your smartphone or tablet (and to each other) via Bluetooth. Six pairs of silicone ear tips (3 closed, 3 open) and 4 pairs of ear fins are included for a secure and comfortable fit. The SPORT True Wireless headphones come with a charging case for storage, and for recharging the batteries.

Drivers: The SPORT True Wireless features 7mm TrueResponse dynamic transducers that deliver 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 5.2: The SPORT True Wireless headphones feature Bluetooth version 5.2 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: 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).

Designed for Sport: The SPORT True Wireless headphones are designed to withstand rigorous activity. The earbuds feature a splash, dust, and sweat-resistant design with an IP54 rating, so you can work out anywhere, even in the rain or snow, without worry. The silicone ear fins tuck behind the folds in your outer ear to help hold the earbuds in place, even during your workout. The fins come in four sizes (N, S1, S2, S3) to help you find the most secure and comfortable fit.

Adaptable Acoustics: The Adaptable Acoustics feature lets you choose the level of immersion or awareness you desire when wearing the headphones. Two types of ear tips are included with the headphones to match the special Adaptable Acoustic EQ modes in the Smart Control app. For an immersive listening experience, you can choose the Focus mode in the app, and install the special Closed ear adapters (with the black cross inside) onto the ear buds. The Focus mode and closed ear adapters minimize your awareness of your surrounding to help you focus on your music or your task. The Aware mode, along with the Open ear adapters (with the blue marking inside), helps you to hear sounds around you. This helps keep you safe when walking or running in public or in high traffic areas.

Voice Assistants: The ear buds are compatible with the voice assistant that is activated to your smartphone, such as Siri or Google Assistant. Tapping the right ear bud 3 times activates the voice assistant for you to make a request or ask a question. You can also activate voice dialing through the voice assistant.

Voice Prompts: The ear buds output voice prompts to confirm events or headphone status. These voice prompts include "Power on," "Power off," "Connected," "No connection," "Pairing," "Pairing successful," "Pairing failed," "Recharge headset," "Call rejected," or "Call ended." In the Smart Control app, you can change the language of the voice prompts, choose between voice prompts and beep sounds, or deactivate some of the status messages.

Rechargeable Batteries: The SPORT True Wireless headphones are powered by built-in 3.7VDC Lithium-Ion rechargeable batteries. Each earbud's has a 55-72 mAh battery, while the charging case has a 400-420 mAh battery. The complete charging cycle of the charging case and earphones is approximately 1.5 hours. A 10-minute Quick Charge provides about 1 hour of playback time. The battery in the charging case charges via USB-C power (5V, 600 mA) using the supplied cable from a laptop, an AC-powered USB charging port, or a mobile 12-volt USB charging port. Fully-charged batteries in the earbuds provide approximately 9 hours playback. The charging case provides enough stored power to charge the earbuds approximately 2 additional times, to extend the playback time to 27 hours.

Phone/Music Controls: Controls for music playback and phone call functions are located on separate earbuds. Both earbuds are equipped with touch-sensitive controls. The left earbud controls Volume Down (hold), and music playback functions Play/Pause (1x) and Previous Track (2x). The right earbud controls Volume Up (hold), Voice Assistant (3x), Play/Pause (1x), and Next Track (2x). For phone call functions, you can use either ear bud to accept (1x), end (1x), or reject (2x) calls. When you're on a call and another call comes in, you can tap either earbud to accept (1x) or reject (2x) the incoming call.

Microphones: Each SPORT True Wireless earbud is equipped with a dual microphone system in a beamforming array (4 mics total). This pickup pattern helps to reduce ambient noise. The microphones have a 100Hz to 10kHz frequency response.

Smart Control App: In addition to the on-board controls, the SPORT True Wireless in-ear headphones can be controlled by Sennheiser's Smart Control app for Android and iOS devices. The app lets you customize the ear buds' on-board controls as you desire. An easy-to-use 3-band EQ, with preset 6 EQ settings (Rock, Pop, Dance, Hip Hop, Classical, Movie), help you personalize the sound. The Adaptable Acoustics feature in the app lets you select the level of immersion or awareness of your surroundings by switching between Focus and Aware modes. Firmware updates for the earphones are also available through the app. The Smart Control app is compatible with iOS devices running version 13.0 and later, and Android devices with version 8.0 and up.


  • Frequency Response: 5Hz - 21kHz
  • Transducer Size: 7mm
  • Total Harmonic Distortion (THD): <0.08% (1 kHz, 94dB SPL)
  • Sound Pressure Level (SPL): 110dB (1 kHz/1mW)
  • Microphone:
    • Frequency Response: 100Hz - 10kHz
    • Pickup Pattern: 2-mic beamforming array for ambient noise reduction
  • Dimensions:
    • Earbuds: 0.737" (w) x 0.885" (h) x 1.042" (d)
    • Charging Case: 2.528" (w) x 1.64" (h) x 1.575" (d)
  • Weight:
    • Earbuds: 0.21 ounces (each); 0.42 ounces (pair)
    • Charging Case: 1.45 ounces (1.87 oz. with earbuds)

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Customer Q&A

3 questions already asked

looking for earbuds for cycling?
daniel  Apr 09, 2024
1 answer
Greetings Daniel. Thank you for your question. We will have many options in the sport earbud category. Please contact one of our advisors at 800-324-9695 for a tailored recommendation.
hogan  Apr 10, 2024 (Staff)
How well do these block external noise? I work in a noisy environment all day, and use earbuds to help protect my ears. I don't want 'active noise cancelling', just a good sealed up pair
nathan  Feb 06, 2024
3 answers
They do a nice job in limiting external noise. I use them to walk and run a busy street. They make for a comfortable jaunt without being isolated from the traffic environment. I use the open ear tips (included). Tried the closed ear tips (included) but they blocked too much of the surrounding sound.
manuel  Feb 12, 2024
These buds do a solid job of reducing ambient noise.
paul  Feb 06, 2024
Greetings Nathen. Thank you for your question. Perhaps one of our fine customers that purchased these can best answer your question. Lets see if anyone submits an answer in the next few days.
hogan  Feb 06, 2024 (Staff)
How to pair?
barry  Jun 25, 2023
1 answer
If you purchased the headphones from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase these from Crutchfield, then you may want to contact the manufacturer.
zachary  Jun 25, 2023 (Staff)

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