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
Black true wireless earphones in compact charging case, matte ABS+PC finish

allentian

allentian wearable technology Bluetooth 5.1 True Wireless Earphones Black

SKU CH-F79M-38Q3F

True wireless earphones with Bluetooth 5.1, a 13 mm driver, 30 mAh buds and a 200 mAh case good for three extra charges

  • ColorBlack
  • Bluetooth 5.1 delivers stable audio up to 15 m away
  • 30 mAh per earbud gives 2.5 hours of play or calls
  • 200 mAh case recharges the buds three times over
  • 13 mm drivers cover 20 Hz–20 kHz for full-range sound
  • Light 7 g earpieces and ABS+PC shell stay comfortable all day

True Wireless Earphones with 5.1 Connectivity

The allentian HXSJ Air-S4 earphones use Bluetooth 5.1 for a stable link up to 15 m. Each bud weighs 7 g and houses a 13 mm driver rated at 320 ohms. The set targets listeners who want compact stereo audio without cables.

Charging Case Extends Play to Seven Hours

The 200 mAh case recharges both 30 mAh buds three times, pushing total play or talk time to roughly seven hours. A full case charge takes 1.5 to 2 hours, while the buds themselves reach capacity in one hour. Blue LEDs flash slowly to confirm TWS pairing.

Check Your Device Supports Bluetooth 5.1

Verify that your phone or tablet runs Bluetooth 5.1 with A2DP 1.3, HFP 1.6 and HSP 1.2 for full feature access. The ABS and PC shells measure 3.1 by 1.6 by 1.6 cm per bud, so confirm the fit suits your ears before ordering.

Highlights

  • Bluetooth 5.1 delivers stable audio up to 15 m away
  • 30 mAh per earbud gives 2.5 hours of play or calls
  • 200 mAh case recharges the buds three times over
  • 13 mm drivers cover 20 Hz–20 kHz for full-range sound
  • Light 7 g earpieces and ABS+PC shell stay comfortable all day

Specifications

ColorBlack

Questions about this item

How often will I need to replace the 30mAh earphone batteries?

The 30mAh batteries are sealed inside each earpiece and are not user-replaceable; when capacity drops you replace the whole earphone pair.

What limit appears first during a long listening session with the 13mm drivers?

Play time reaches 2 to 2.5 hours before the earphones need recharging in the case.

How warm do the Bluetrum 5376 chipset and 320Ω impedance drivers get during all-day use?

With only 3mW rated power and 5mW maximum the earpieces stay barely warm even after repeated charging cycles.

Also in this aisle

People compared these

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