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Black in-ear headphones with stainless steel sound tunnels and neckband, plus charging cable and case

Sennheiser

Sennheiser Momentum Free Special Edition In-Ear Headphones 508698

SKU CH-PZD5-AS5WD MPN 508698

Bluetooth 4.2 in-ear headphones with apt-X and AAC, stainless-steel sound tunnels, 6-hour battery, NFC pairing and multi-device connection

  • Frequency range15 Hz-22 kHz
  • Headphone style<0.5%
  • Audio sensitivity- 44 dB V/Pa Sending Loudness Rating (SLR) Wideband: 10 dB +
  • Wireless technologyBluetooth 4.2
  • Battery packBuilt-in Rechargeable Lithium-ion Polymer (~85 mAh) with mor
  • Supported distanceUp to 10 m
  • Bluetooth 4.2 with apt-X and AAC delivers hi-fi wireless sound
  • Machined stainless steel sound tunnels produce powerful bass and detailed vocals
  • NFC one-touch pairing connects instantly to compatible smart devices
  • Multi-point connection handles two devices simultaneously with voice prompts
  • Built-in 85 mAh battery provides six hours of listening per charge

Momentum Free Special Edition

The Sennheiser Momentum Free Special Edition in-ear headphones deliver wireless audio through Bluetooth 4.2 with Qualcomm apt-X and AAC support. They target listeners who want the Momentum sound signature in a compact, cable-free form for daily commuting or office use.

Stainless steel sound tunnels

Premium transducers sit inside machined stainless steel sound tunnels built for durability and acoustic precision. The neckband design carries a built-in 85mAh lithium-ion polymer battery rated for over 500 charge cycles and up to six hours of playback. NFC enables one-touch pairing while multi-connection handles two devices simultaneously with voice prompts and three-way calling. A USB charging cable, four ear adaptor sizes and a carrying case complete the package.

Upgrade from basic wireless buds when sound

These replace entry-level Bluetooth earphones that sacrifice clarity for convenience, stepping up to a 15Hz-22KHz frequency response and sub-0.5% THD. The jump is worth it for buyers who prioritise detailed vocal projection and soundstage over maximum battery life or ruggedised sport features.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $145.99
Pricier than about 90% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameSennheiser
Product lineMomentum Free
Model nameMomentum Free Special Edition
Part number508698
Product typeIn-Ear
Performance
Supported distanceUp to 10 m
Audio & video
Frequency range15 Hz-22 kHz
Headphone style<0.5%
Audio sensitivity- 44 dB V/Pa
Sending Loudness Rating (SLR)
Wideband: 10 dB +/- 5 dB
Narrowband: 8 dB +/- 5 dB
Connectivity
Wireless technologyBluetooth 4.2
Power
Battery packBuilt-in Rechargeable Lithium-ion Polymer (~85 mAh) with more than 500 charges
Size & build
Shipping weight0.20 kg
Package size124 × 107 × 53 mm
In the box
In the boxWireless Headset
USB Charging Cable
Ear Adaptor Set (XS, S, M, L)
Carrying Case
Safety & Quick Guides

Questions about this item

What Bluetooth version does the Sennheiser Momentum Free Special Edition 508698 use, and what audio codecs does it support?

It uses Bluetooth 4.2 with Qualcomm apt-X and AAC codecs for enhanced hi-fi sound quality.

Which ear adaptor sizes are included to ensure the in-ear headphones fit securely?

The package includes an ear adaptor set with XS, S, M, and L sizes for a custom fit.

How do you pair the headphones using NFC, and what is the common mistake to avoid?

Tap the NFC zone on the headphones to an NFC-enabled device for one-touch pairing; the mistake is tapping before the headphones are in pairing mode.

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