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Pair of gold in-ear Bluetooth headphones with ear hooks and charging case

Rulefiss Q38 In-Ear Headphones Gold Bluetooth 5.4 56Hrs IP7

SKU CH-PK47-9XTV2

Gold in-ear headphones with Bluetooth 5.4 deliver 56 hours of playtime, IP7 waterproofing and 14.2 mm drivers for detailed sound

  • Driver size14.2 mm
  • Frequency range5 Hz-20 kHz
  • Headphone styleIn Ear
  • Impedance32 ohms
  • Signal-to-noise ratio108 decibels
  • Power supplyBattery, p76, nonstandard battery, true
  • Hi-Fi sound from 14.2 mm drivers and AAC/SBC decoder
  • Bluetooth 5.4 dual-channel link with 41 ms latency
  • 56 hours total playtime with USB-C fast charge in 1.5 hours
  • IP7 waterproof rating protects against sweat and rain
  • Four microphones with ENC keep 80 % of voice on calls

Rulefiss Q38 Gold Bluetooth 5.4 Earbuds

The Rulefiss Q38 are gold-coloured in-ear headphones built for sport and daily commuting. They use Bluetooth 5.4 with dual-channel transmission and an AAC/SBC decoder driving 14.2 mm dynamic units. Each bud weighs 7 grams and supports mono or stereo use, while an IP7 rating protects against sweat and rain during workouts.

Passive Noise Isolation and 56-Hour Battery

Passive isolation reduces ambient sound without active circuitry, and CVC 8.0 microphone processing retains 80 percent of voice during calls. The charging case holds 800 mAh and shows remaining capacity on an LED percentage display. A full case recharge takes 1.5 hours via USB-C and yields up to 56 hours total playtime at 6 to 8 hours per bud charge.

Stable Connection and Low Latency Under Load

Bluetooth 5.4 raises transmission speed by 100 percent and stability by 70 percent over Bluetooth 5.3, cutting latency to 41 ms for video and gaming. The frequency response extends from 18 Hz to 25 kHz, a 75 percent bandwidth increase, while 32 ohm impedance and 108 dB sensitivity maintain consistent output during long sessions.

How it compares

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

Price $32.99
Pricier than about 59% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameRulefiss
Model nameQ38
Product typeIn-Ear
Product colorGold
Performance
Supported distance15 m
Audio & video
Driver size14.2 mm
Frequency range5 Hz-20 kHz
Headphone styleIn Ear
Impedance32 ohms
Signal-to-noise ratio108 decibels
Audio sensitivity108 decibels
Wearing styleSingle Ear
Noise cancellationPassive
Mic impedance~3K ohm
Mic frequency response20 Hz-20 kHz
Mic signal-to-noise ratio108 decibels
Mic sensitivity108 decibels
Connectivity
Wireless technologyBluetooth
Ports & slots
ConnectionUSB
Power
Power supplyBattery, p76, nonstandard battery, true
Battery pack56 h
Run time56 h
Charging time1.5 h
Built-in batteryBattery
Size & build
Cord lengthQ38 Bluetooth headphones * 2
Product weight7 g
In the box
In the boxUSB-C cable * 1, 800 mAh charging box * 1, Q38 Bluetooth headphones * 2, Soft silicone ear caps * 6 (L/M/S)

Questions about this item

How do I pair the Rulefiss Q38 earbuds and what is the step people often miss?

Remove both earbuds from the 800mAh charging case, they enter pairing mode automatically. Select "Q38" on your phone. The step many miss: the earbuds cannot connect to two devices at the same time, so disconnect the first device before pairing a second.

What will need replacement first on the Q38 and when?

The six silicone ear caps (L/M/S) wear out before the electronics. Swap them when the seal loosens or bass drops off. The 800mAh case battery holds 56 hours total playtime; after several hundred cycles its capacity will fade, but no user-replaceable cell is inside.

What is the first limit I will hit during a long workout with the Q38?

Each earbud gives 6-8 hours per charge. After that the 800mAh case must recharge them, which takes 1.5 hours via USB-C. IP7 waterproofing handles sweat and rain continuously, so battery endurance is the practical ceiling.

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