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Dark black in-ear wireless earbuds with charging case

No Sew

No Sew B01 Bluetooth 5.4 earbuds 50 hrs Dark Black

SKU CH-GK4B-E6CXS

In-ear Bluetooth 5.4 earbuds deliver 50 hours total playback, 14 mm titanium drivers, ENC microphones and IP7 waterproofing

  • TypeIn-Ear
  • ColorDark Black
  • THDIn Ear
  • Power Supplybattery, true
  • Ear CouplingSingle Ear
  • Wireless TypeBluetooth
  • Bluetooth 5.4 reaches 15 metres with 48 Mbit/s speed
  • 14 mm titanium drivers deliver HiFi sound via AAC and SBC
  • Four mics with ENC cut 80 % of call noise
  • 50 hours total playtime with 1.5 hour USB-C charge
  • LED display shows case and earbud charge status

Bluetooth 5.4 wireless earbuds

These true-wireless in-ear headphones use Bluetooth 5.4 with a high-sensitivity FPC antenna to reach 48 Mbit/s transmission speed and 100 ms latency across a 15 metre range. The 14 mm titanium-diaphragm dynamic drivers support AAC and SBC encoding for HiFi sound, while four microphones with ENC suppress 80 percent of ambient noise during calls.

What to verify before ordering

Your phone, tablet or computer must support Bluetooth 5.4 or an earlier compatible version to pair with these earbuds. A USB-C power source is required to recharge the case, which takes 1.5 hours for a full charge. The IP7 rating protects against water immersion, so confirm the environment matches that level of exposure.

What this replaces and when to upgrade

The earbuds replace older Bluetooth headsets that lack 5.4 efficiency, delivering 30 percent lower power consumption and up to 50 hours total playback with the case. Single-charge life reaches 8 hours, and the LED display shows real-time case and bud status. Buyers who need over-ear comfort or multi-point connectivity should look elsewhere.

Highlights

  • Bluetooth 5.4 reaches 15 metres with 48 Mbit/s speed
  • 14 mm titanium drivers deliver HiFi sound via AAC and SBC
  • Four mics with ENC cut 80 % of call noise
  • 50 hours total playtime with 1.5 hour USB-C charge
  • LED display shows case and earbud charge status

Specifications

Brandchalvh
ModelB01
TypeIn-Ear
ColorDark Black
THDIn Ear
Power Supplybattery, true
Ear CouplingSingle Ear
Wireless TypeBluetooth
Contains Embedded Batterybattery
Features5.4, Detachable, Wireless, In Ear, dynamic_driver

Questions about this item

What comes in the box and what must I buy separately?

The earbuds include a charging case with a smart LED digital display and use USB-C for charging; no separate cable or accessory purchases are required.

Which model should I choose if I want the 50-hour playback version?

The B01 model delivers up to 50 hours total playback with the case and 8 hours per charge on the buds themselves.

What does the 48 Mbit/s transmission speed mean for daily use?

It enables Bluetooth 5.4 to stream audio with 100 ms latency and a stable connection up to 15 metres while using 30 % less power.

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