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Tiny black in-ear buds with compact charging case

No Sew

No Sew M51-Black Sleep Earbuds Bluetooth 5.4 58h Black

SKU CH-V9T5-F7SQZ

Ultra-light in-ear sleep buds with Bluetooth 5.4, touch controls, sound isolation and a charging case delivering 58 hours total playtime

  • TypeIn-Ear
  • ColorBlack
  • THDIn Ear
  • Input Impedance16 ohms
  • Power Supplytrue
  • ConnectorNo Jack
  • Bluetooth 5.4 gives stable links up to 12 metres
  • 58-hour total playtime from the charging case
  • 0 g ultra-light fit stays secure for side sleepers
  • Touch controls handle music, calls and voice assistant
  • 10 mm dynamic drivers deliver stereo sound with clear calls

Sleep Earbuds Bluetooth 5.4

These true-wireless earbuds use Bluetooth 5.4 for a stable link up to 12 metres. The in-ear design weighs 3.0 g per bud and provides passive sound isolation. A compact charging case extends total playtime to 58 hours and recharges via Type-C in 1.5 hours. Touch controls handle playback, calls and voice assistant without a phone in hand.

Side sleepers and light listeners

The feather-light, single-ear fit stays comfortable when lying on a pillow and blocks ambient noise passively. Buyers who want over-ear comfort, active noise cancellation or a wired connection should look at other form factors. The 6-hour single-charge span suits overnight use but not full-day marathons without the case. Compatibility covers iOS and Android devices with Bluetooth audio.

Bluetooth 5.4 and 58-hour case

Bluetooth 5.4 is the spec that decides fit: it governs connection stability, latency and the 12-metre range. The 10 mm dynamic drivers and 16-ohm impedance are fixed by the hardware and cannot be changed. If your source does not support Bluetooth 5.4 you will lose the advertised pairing speed and distance.

Highlights

  • Bluetooth 5.4 gives stable links up to 12 metres
  • 58-hour total playtime from the charging case
  • 0 g ultra-light fit stays secure for side sleepers
  • Touch controls handle music, calls and voice assistant
  • 10 mm dynamic drivers deliver stereo sound with clear calls

Specifications

BrandPiluyaa
ModelM51-Black
Part NumberM51-Black
TypeIn-Ear
ColorBlack
THDIn Ear
Input Impedance16 ohms
Power Supplytrue
ConnectorNo Jack
Ear CouplingSingle Ear
Weight0.05 kilograms
Noise Cancellingsound_isolation
Wireless TypeBluetooth
Battery6 hours
Operating Time6 hours
Charge Time1.5 hours
Distance12 meters
Microphone Impedance16 ohm
Featuressound_isolation, 5.4, 6 hours, touch, Wireless, In Ear, dynamic_driver, 16 ohm, 12 meters

Questions about this item

How do I pair the Bluetooth 5.4 earbuds for the first time?

Open the charging case lid; the earbuds enter pairing mode automatically. Select "M51-Black" on your phone's Bluetooth menu. They reconnect to the last device whenever the case is opened again.

What part will need replacement first with daily use?

The internal lithium-ion cells in each earbud and the case degrade after repeated charge cycles. Expect reduced playtime after several hundred full charges; the earbuds themselves are not user-serviceable.

How long can I listen continuously before the earbuds must go back in the case?

Each earbud delivers about 6 hours of playback at moderate volume. The case holds enough reserve for roughly 58 hours total, so you can recharge the buds multiple times before the case needs a Type-C top-up.

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