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Black in-ear wireless earbuds in a charging case with LED display

No Sew

No Sew I66 Wireless Earbuds Bluetooth 5.4 50H Playtime

SKU CH-MCSF-BKDPC

In-ear wireless earbuds with Bluetooth 5.4, 13 mm dynamic drivers, ENC noise cancellation, IP7 waterproofing and 50 hours total playtime

  • Headphone styleIn Ear
  • Power supplyBattery, true
  • ConnectionNo Jack
  • Wearing styleSingle Ear
  • Cord lengthSilicone earplugs
  • Wireless technologyBluetooth
  • Bluetooth 5.4 cuts latency by 30 ms for responsive audio
  • 13 mm graphene-TPU driver delivers Hi-Fi stereo with 60 % stronger bass
  • Four HD mics with ENC filter 80 % of background noise for clear calls
  • Charging case extends playtime to 50 hours with 1.5 h USB-C recharge
  • IP7 waterproof rating protects earbuds during workouts and rain

In-Ear Wireless Earbuds with Bluetooth 5.4

These in-ear earbuds use Bluetooth 5.4 for dual-channel transmission and support HFP, A2DP, HSP and AVRCP. A 13 mm graphene-TPU composite dynamic driver delivers Hi-Fi stereo sound with ENC noise-cancelling microphones. The charging case extends total playtime to 50 hours and shows remaining power on dual LED digits.

Suits commuters and active users wanting long

Ideal for anyone who wants up to 50 hours of combined playback, USB-C charging, IP7 waterproofing and touch controls for calls and music. Not for listeners who prefer over-ear fit, need a wired connection option, or require active noise cancellation for ambient sound blocking.

Bluetooth 5.4 with 13 mm driver and 50-hour case

The single specification that decides fit is the Bluetooth 5.4 link paired with a 13 mm dynamic driver and a charging case rated for 50 hours total use. If your device supports Bluetooth 5.4 or earlier and you want in-ear monitoring with ENC call clarity, this matches the requirement.

How it compares

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

Price $16.99
Cheaper than about 68% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameNerunsa
Model nameI66
Product typeIn-Ear
Product colorBlack
Performance
Supported distance15 m
Audio & video
Headphone styleIn Ear
Wearing styleSingle Ear
Connectivity
Wireless technologyBluetooth
Ports & slots
ConnectionNo Jack
Power
Power supplyBattery, true
Battery pack8 h
Run time8 h
Charging time1.5 h
Built-in batteryBattery
Size & build
Cord lengthSilicone earplugs
In the box
In the boxWireless Earbuds, Portable charging box, Silicone earplugs, USB-C charging cable

Questions about this item

How do I confirm the LED digital display is showing the correct battery status after pairing?

The dual LED digital display shows the remaining charge for both earbuds and the charging case at a glance.

Which accessories are included and what must I buy separately?

The box contains the wireless earbuds, a portable charging case, silicone earplugs and a USB-C charging cable; no extra items are required for basic operation.

Should I choose the I66 model for its 13 mm graphene-TPU driver and 50-hour total playtime?

Yes — the I66 uses a 13 mm dynamic driver with a graphene-TPU composite diaphragm and the charging case extends listening time to 50 hours.

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