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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

  • Headphone styleIn Ear
  • Impedance16 ohms
  • ConnectionNo Jack
  • Wearing styleSingle Ear
  • Noise cancellationSound isolation
  • Wireless technologyBluetooth
  • 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.

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 namePiluyaa
Model nameM51-Black
Part numberM51-Black
Product typeIn-Ear
Product colorBlack
Performance
Supported distance12 m
Audio & video
Headphone styleIn Ear
Impedance16 ohms
Wearing styleSingle Ear
Noise cancellationSound isolation
Mic impedance16 ohm
Connectivity
Wireless technologyBluetooth
Ports & slots
ConnectionNo Jack
Power
Power supplyYes
Battery pack6 h
Run time6 h
Charging time1.5 h
Size & build
Product weight0.05 kg

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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