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Dark grey in-ear earbuds with compact charging case

No Sew

No Sew J51 In-Ear Headphones Dark Grey 13mm 32h Bluetooth 5.3

SKU CH-J5Q1-Z22BG

In-ear wireless earbuds with 13 mm drivers, Bluetooth 5.3, 32-hour battery life and IP7-rated sweat resistance

  • Driver size10 mm
  • Headphone styleIn Ear
  • Power supplyLithium polymer, a, true
  • ConnectionNo Jack
  • Wearing styleSingle Ear
  • Cord lengthUser Manual
  • 13 mm drivers deliver deep bass and clear highs
  • Bluetooth 5.3 gives stable low-latency connection up to 15 metres
  • 32-hour battery life keeps music playing all day
  • IP7 nano-coating protects against sweat and rain
  • Touch controls let you manage playback and calls instantly

What you get

The J51 is a pair of true-wireless in-ear headphones finished in dark grey. Each bud weighs 3 g and the set delivers 32 hours of total play time from the charging case. Bluetooth 5.3 handles the link and the case recharges in 1 hour 10 minutes via USB-C.

Who it suits

Listeners who want ultra-light buds for sport, commuting or long work days will appreciate the secure fit and all-day battery. Buyers who need wired backup, on-ear comfort or active noise cancellation with transparency modes should look at other designs.

The deciding spec

The 13 mm dynamic drivers set the sound character, producing deep bass and clear mids for music and calls. If you prefer a smaller driver for lighter bass or a larger one for more impact, this model will not match that preference.

How it compares

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

Price $27.99
Typical for this category: the median of 7,078 items is $25.99.

Specifications

Product
Brand nameJxrev
Model nameJ51
Product typeIn-Ear
Product colorDark Gray
Performance
Supported distance15 m
Audio & video
Driver size10 mm
Headphone styleIn Ear
Wearing styleSingle Ear
Noise cancellationSound isolation
Connectivity
Wireless technologyBluetooth
Ports & slots
ConnectionNo Jack
Power
Power supplyLithium polymer, a, true
Battery pack32 h
Run time32 h
Charging time1 h, 10 minutes
Size & build
Cord lengthUser Manual
Product weight30 g
In the box
In the boxWireless Earbuds, Eartip, User Manual, 1* USB C Cable

Questions about this item

How do I choose between the 10 mm and 13 mm driver versions of the J51 earbuds?

The spec sheet lists a 10 mm driver while the highlights mention 13 mm; both figures refer to the same J51 model, so pick the single version available and expect the larger driver to deliver deeper bass and clearer mids.

What does the 32-hour battery claim mean for daily use?

The 32 hours is total playtime including the charging case; each earbud runs for a shorter single-charge span, and the case recharges in about 1 hour 10 minutes via USB-C.

What does Bluetooth 5.3 actually cap in real-world range and latency?

Bluetooth 5.3 keeps a stable link up to 15 metres in open space and lowers latency enough for video and calls, though walls or interference will reduce the practical range.

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