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Black in-ear wireless earbuds with matching charging case

Hetai Tech

Hetai Tech i38S TWS Earbuds Bluetooth 5.0 Black

SKU CH-XKDD-KYJSM

True wireless earbuds with Bluetooth 5.0, IPX4 splash resistance, and a 400 mAh charging case for up to 80 hours standby

  • Product typeHeadphone
  • Bluetooth 5.0 chip for lower power consumption and stable connection
  • 400 mAh charging case delivers up to 80 hours standby time
  • Touch controls let you manage music, calls and voice assistant
  • IPX4 waterproof rating protects against sweat and splashes during sport
  • 40 mAh earbud batteries provide 2 to 3 hours playtime per charge

What the Hetai Tech i38S earbuds are for

These true-wireless earbuds use bluetooth 5.0 for a stable link up to 10 metres. They deliver HiFi stereo sound with enhanced bass and are rated IPX-4 against sweat and splashes. The set suits commuters, gym users and anyone wanting cable-free audio with touch controls for playback and voice-assistant access. They are not for listeners who need active noise cancellation, aptX codec support or multi-point pairing with two devices at once.

Check before ordering

Your phone, tablet or computer must support bluetooth 5.0 or an earlier compatible version to pair with the i38S. Verify the device can handle standard A2DP audio streaming and HFP for calls. The charging case uses a wired cable (included) so a free USB-A port or adapter is required. Buyers who want wireless charging, a USB-C case port or a dedicated app for EQ adjustment will not find those features here.

Thermals noise and power draw

Each earbud holds a 40 mAh cell giving 2 to 3 hours of playtime; the case stores 400 mAh for multiple top-ups and 80 hours of standby. A full recharge takes 1 to 1.5 hours via the supplied cable. In normal use the buds stay cool to the touch and emit no audible fan or coil noise. Power draw is low thanks to the bluetooth 5.0 chip, so battery drain on the host device remains minimal.

How it compares

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

Price $40.99
Pricier than about 65% of the 7,078 comparable items (median $25.99).

Specifications

Product
Product typeHeadphone

Questions about this item

What comes in the box with the i38S earbuds and do I need a separate charger?

The box contains the left and right earbuds, a charging case, a charging cable and a user manual. The case charges the earbuds; plug the cable into any standard USB power source.

Should I choose the black or grey version of the i38S?

Both colours share the same specifications — bluetooth 5.0, IPX-4 water resistance, 40 mAh earbud batteries and a 400 mAh case — so the choice is purely aesthetic.

What does the 2 to 3 hour work time mean for daily use?

Each charge gives roughly 2 to 3 hours of playback; the case holds enough power for several extra cycles, extending total listening time before you need to recharge the case itself.

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