We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
White in-ear earbuds in a matching charging case with LED display

No Sew

No Sew S40 Bluetooth 5.4 in-ear headphones white

SKU CH-C52R-WF8HS

In-ear wireless earphones with Bluetooth 5.4, 48-hour total playtime, LED battery display and IPX7 waterproofing

  • TypeIn-Ear
  • ColorWhite
  • Driver Unit14.2 millimeters
  • THDIn Ear
  • Input Impedance100 ohms
  • ConnectorNo Jack
  • Dual LED display shows case and earbud power levels
  • Bluetooth 5.4 enables fast one-step pairing after first use
  • 48 hours total playtime from 400 mAh charging case
  • IPX7 rating protects against water and sweat during sport
  • Touch controls handle music, calls and voice assistant

What the S40 earbuds deliver

The No Sew S40 are true-wireless in-ear headphones built around Bluetooth 5.4 for stable audio streaming. They target commuters, gym-goers and office workers who want a compact, cable-free listening option with long total runtime. The package includes a portable charging case, USB-C cable and user manual so everything needed to start is in the box.

Build, controls and daily convenience

A dual digital LED display on the case shows remaining power for both the case and each earbud, removing guesswork before you leave home. Touch panels on either bud handle playback, volume, calls and voice-assistant activation without reaching for a phone. IPX7-rated nano-coating shields the buds from heavy sweat and rain during runs or outdoor workouts. The hall-switch mechanism pairs automatically the moment the case is opened after the first connection.

Battery life, heat and power draw

Each earbud carries a battery rated for 7 hours of continuous play, while the 400 mAh case stores enough energy for roughly four full recharges, yielding up to 48 hours of combined listening. A full case recharge takes about 1 hour over USB-C. The low-power Bluetooth 5.4 link and modest 14.2 mm drivers keep the buds cool during extended sessions, and no active noise-cancelling circuitry means there is no extra drain or audible hiss.

Highlights

  • Dual LED display shows case and earbud power levels
  • Bluetooth 5.4 enables fast one-step pairing after first use
  • 48 hours total playtime from 400 mAh charging case
  • IPX7 rating protects against water and sweat during sport
  • Touch controls handle music, calls and voice assistant

Specifications

BrandBUABMEQ
ModelS40
TypeIn-Ear
ColorWhite
Driver Unit14.2 millimeters
THDIn Ear
Input Impedance100 ohms
ConnectorNo Jack
Ear CouplingSingle Ear
Cord LengthPortable charging box
Noise Cancellingnone
Wireless TypeBluetooth
Battery7 hours
Operating Time7 hours
Charge Time1 hours
Microphone Impedance600 ohms
Featuresnone, 5.4, 7 hours, Made from high-quality and durable materials, protecting the cable from damage and extending its lifespan, ensuring rapid charging for your Bluetooth earphones., Touch Control, touch, Wireless, In Ear, dynamic_driver, 100 ohm, USB-C charging cable
Package ContentsUSB-C charging cable, User Manual, Portable charging box, S40 Wireless Earbuds(L/R)

Questions about this item

How does Bluetooth 5.4 affect the S40 earbuds' connection range and stability?

Bluetooth 5.4 provides a stable, low-latency link for audio streaming and calls. The earbuds use a hall switch for automatic pairing when the case is opened after the first setup.

What physical items come in the box for charging and fit?

The package includes the S40 left and right earbuds, a portable charging case, a USB-C charging cable, and a user manual. The case holds a 400mAh battery for up to 48 hours total playback.

How do I install the earbuds and what step do users often miss?

Remove the earbuds from the case to power them on. Open Bluetooth settings on your device and select S40. The step often missed is placing earbuds back in the case to trigger recharging after use.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.