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Sennheiser CX 7.00 BT

Neckband wireless Bluetooth® headphones

Item # 143CX700BT

Discontinued item

Item # 143CX700BT

About the Sennheiser CX 7.00 BT

Sennheiser sound in a trendy neckband design

Neckband earbuds are popular these days — and our customers have always dug Sennheiser headphones. The CX 7.00 BT in-ear headphones feature a sturdy neckband that stabilizes the earbuds as you move around. Music plays wirelessly, and the sound is all Sennheiser. When I spoke to the company's legendary designer Axel Grell, he told me that the company uses the super-premium models (like their flagship in-ears, the IE 800 S headphones) to inform the design of all of their headphones.

Product highlights:

  • Bluetooth 4.2 for wireless music listening and phone calls with compatible smartphones
    • aptX® and AAC decoding provides high-quality music streaming from compatible devices
  • earbud cables connect to a rigid neckband
    • neckband vibrates for phone call notification
  • drivers tuned to deliver Sennheiser's clear, distinctly smooth sound
  • 3-button remote for controlling music playback and volume with a smartphone or portable music player
  • built-in microphone for making calls with a smartphone
  • built-in rechargeable battery offers up to 10 hours of listening (USB charging cable included)
  • earpieces and cord feature bright, reflective colors for visibility and safety
  • includes 4 sizes of ear tips for a proper fit
  • carry case
  • frequency response: 17-21,000 Hz
  • weight: 1.7 ounces
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 507357

What's in the box:

  • Neckband-style wireless in-ear headphones
  • 4 Pairs of silicone ear tips (1 pair installed)
  • 51" USB charging cable (Type A USB on one end and Micro-B USB on other end)
  • Cloth storage pouch
  • Quick Guide
  • Safety Guide
  • Compliance Information

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Crutchfield response

<< >>

More details on the Sennheiser CX 7.00 BT

Mark G.

Features & specs

Fit Style In-ear/Earbud
Earcup Type Closed
Earcup Width x Height 0.482" x 0.482"
Noise-canceling No
Bluetooth Yes
Mic For Taking Calls Yes
Voice Assistant Access
Amazon Alexa No
Google Assistant No
Siri No
3.5mm No
1/4" No
Lightning No
4.4mm balanced No
XLR4 balanced No
2.5mm No
Other None
Frequency Response 17-21k Hz
Sensitivity N/A dB
Impedance N/A
Weight 1.7 ounces
Cord Length 9" + 9"
Parts Warranty 2 Years
Labor Warranty 2 Years

Product Research


Overview: The Sennheiser CX 7.00BT in-ear neckband-style wireless headphones are lightweight and comfortable. The ear buds are the same as the CX 6.00BT wireless in-ear headphone with their durable construction, but add a comfortable neckband. The CX 7.00BT in-ear wireless headphones feature Bluetooth with NFC one-touch pairing, and come with 3 pairs of silicone ear tips, a USB charging cable, and a soft cloth storage pouch.

Design: The CX 7.00BT in-ear wireless headphones are equipped with high-performance dynamic drivers, housed in an ergonomic ear bud that is angled at 15°. The sleek neckband rests comfortably at the base of your neck while the ear buds are attached to the neckband by 9" wires.

Bluetooth 4.1: With Bluetooth 4.1, the CX 7.00BT in-ear wireless headphones give you freedom from cables. They are compatible with Qualcomm apt-X and AAC codec support for high-fidelity sound. Supported profiles include A2DP, AVRCP,and HFP. NFC One-touch pairing lets you immediately connect to your compatible Android devices. The headphones can save the connection profiles for up to eight Bluetooth devices.

Ear Sleeves: The CX 7.00BT in-ear wireless headphones come with four sizes of silicone ear sleeves (XS, S, M, L) to assure you'll find the perfect fit.

Remote/Microphone: The CX 7.00BT in-ear wireless headphones has on-board controls and a microphone on the neckband. The 3-button remote lets you control volume, music playback (play, pause, play next song, play previous song), and phone functions (accept call, end call, reject call, voice control). The built-in omni-directional microphone lets you carry on your phone conversations with clarity. The headphones provide voice notification of the pairing status and low-battery warnings.

Battery: The headphones are equipped with a built-in Lithium-Polymer battery (170mAh) to give you a full 10 hours of playback from a 1.5 hour charge. The battery charges via the supplied Micro USB cable.


  • Frequency Response (Headphones): 17Hz - 21kHz
  • Sound Pressure Level (SPL): 112 dB (1 kHz/0 dBFS)
  • Total Harmonic Distortion (THD): < 0.5 % (1 kHz, 100 dB SPL)
  • Dimensions:
    • Ear Buds: 0.482" diameter, 0.885" depth
    • Neckband: 18" length, 0.732" height, 9" cable length (each side)
  • Weight: 1.7 ounces

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