Rulefiss Q38 Wireless Earbuds - A Sporty and Feature-Packed Choice

Published on May 10, 2023, 5:07 p.m.

The Rulefiss Q38 Wireless Earbud is a feature-packed audio accessory that combines convenience, performance, and durability. With its Bluetooth 5.3 technology, dual LED digital display, comfortable earhook design, and IP7 waterproof rating, these earbuds are designed for sports enthusiasts and active individuals. In this article, we will explore the various aspects of the Rulefiss Q38 Wireless Earbuds, discussing its design, comfort, sound quality, and overall performance.

Design and Comfort

The Rulefiss Q38 Wireless Earbuds features a sleek and sporty design. The earbuds come with adjustable and secure-fit silicone earhooks, ensuring they stay comfortably in place during rigorous activities. This design eliminates the worry of earbuds falling off while running or engaging in other outdoor activities. Additionally, the earbuds are constructed with IP7 waterproof standard, providing protection against sweat, heavy rain, and spilled liquids. You can enjoy high-quality music without any concerns about water damage.

Rulefiss Q38 Sound Quality

Sound Quality

The Rulefiss Q38 Wireless Earbuds produce a pleasant, balanced sound with a slight bass boost that’s well suited for pop and rock music. It won’t blow away audiophiles but provides plentiful detail and volume for workout earbuds at this price. Phone calls were also clear on both ends.

Rulefiss Q38 Bluetooth 5.3 Technology

Bluetooth 5.3 Technology and Easy Pairing

Equipped with advanced Bluetooth 5.3 technology, these Rulefiss Q38 Wireless Earbuds offer a more stable connection, lower latency, and reduced power consumption during data transmission. The one-step pairing feature allows for seamless connectivity. Simply pick up two earbuds, and they will automatically connect to each other. With just one step, you can easily pair the earbuds with your mobile phone via Bluetooth settings. Additionally, the Rulefiss Q38 Wireless Earbuds supports seamless transformation between single mode and dual mode, providing flexibility based on your listening preferences.

Discuss how Bluetooth 5.3 enhances the earbuds’ connectivity stability, range, and energy efficiency, providing a technical perspective that adds depth to the product analysis.

Dual LED Digital Display and Extended Playtime

The Rulefiss Q38 Wireless Earbuds comes with a charging case that features a dual LED digital display. This display shows the remaining power of both the earbuds and the charging case in percentage, allowing you to monitor their battery levels conveniently. The 800mAh compact charging case offers an impressive 48 hours of total playtime. On a single charge, the Rulefiss Q38 Wireless Earbuds themselves provide 6-8 hours of playtime, and the charging case can fully recharge them in just 1.5 hours using the included Type-C quick charge cable.

 Q38 wireless earbuds Battery Life

Battery Life and Charging

The Rulefiss Q38 Wireless Earbuds are rated for 6-8 hours of playback on a single charge. The included charging case provides an additional 3-4 charges, for a total of up to 48 hours of battery life. Actual battery life will vary with use and volume levels.

To charge the earbuds, simply place them in the charging case and close the lid. The Rulefiss Q38 Wireless Earbuds will automatically power off and start charging. The LED indicator lights on the front of the case will show the charging status of the case and earbuds:

• Red light: Earbuds are charging
• Blue light: Earbuds are fully charged
• Flashing red light: Case battery low
• Solid red light: Case is charging
• Blue light: Case is fully charged

It takes around 1.5 hours to fully recharge the Rulefiss Q38 Wireless Earbuds and 2-3 hours to charge the case. For the fastest, most effective charging, use a USB wall charger or USB charger and the included USB-C cable. Both the case and earbuds support USB-C charging.

Some tips for maximum battery life:

• Charge the Rulefiss Q38 Wireless Earbuds in short bursts when not in use rather than charging from empty to full in one go. Partial discharges and recharges are better for long-term battery health.

• Do not leave the earbuds on the charger for more than a day after they reach 100%. Overcharging li-ion batteries can reduce their lifespan.

• Run the earbuds down close to empty (0-10% left) once a month or so and then recharge fully. This helps calibrate the battery indicators.

• Lithium-ion batteries slowly lose capacity over time and charge cycles. After 2-3 years, you can expect up to 15-20% reduction in play time per charge. This is normal and the earbuds will continue working, but battery life will be shorter.

• Do not expose the earbuds or case to extreme heat or cold, which can temporarily reduce capacity and charge times. Room temperature conditions are best.

• If storing the earbuds for longer than a month, discharge them to 40-50% charge. This reduces strain on the battery from sitting at a high or low charge for prolonged periods. Recharge as needed before using again.

Smart Touch Control and Wide Compatibility

The Rulefiss Q38 Wireless Earbuds features a multi-function touch panel on each earphone, enabling convenient control over various functions. You can play, pause, adjust volume, answer and end calls, and even activate Siri or Google Assistant with a simple touch. These Rulefiss Q38 Wireless Earbuds are compatible with smartphones running iOS 9.0 or above and Android 5.0 or above, as well as other Bluetooth 4.0 or above devices. The elimination of tangled wires adds to the convenience and freedom of using these headsets.

Understanding IP7 Waterproof Rating

Elaborate on what the IP7 rating entails, how it’s tested, and its implications for users who engage in water-involved activities or are concerned about sweat and rain.

Use Cases and Application Scenarios

The Q38 wireless earbuds are ideal for the following uses:

• Workouts - Their IPX7 water resistance, secure fit, and balanced sound make them great gym and exercise companions.
• Casual listening - While not the most premium sounding, they provide perfectly enjoyable audio for podcasts, audiobooks, YouTube, and light music listening.
• Calls - Their onboard mic handles calls well, with clear audio in both directions. They’re a solid headset replacement for calls on the go.

User Feedback

The Rulefiss Q38 earbuds have been praised by users for their durability, sound quality, and battery life:

  • Many users raved about the sturdy yet flexible earhooks that keep the buds firmly in place during intense workouts and runs without falling out or needing adjustment. The earhooks really “lock in” the fit.

  • With an IP7 waterproof rating, users reported using them comfortably in the rain and during sweaty gym sessions without moisture damage. The waterproofing gives peace of mind.

  • Users found the sound very balanced with punchy bass, clear mids, and crisp highs. The 10mm drivers deliver immersive sound well-suited for rocking out to music.

  • Battery life lived up to claims, with some users getting even more than the advertised 48 hours of playtime. The quick charge feature juices them up rapidly.

  • Noise cancelling effectively eliminated ambient sounds, allowing users to focus on their music or calls without outside distractions seeping in.

  • Some users did report occasional connectivity issues and cutting out at long distances from their phone. But overall the Bluetooth 5.3 provided reliable connections.

Pros and Cons

Pros Cons
Exceptional Bluetooth connectivity and battery life Takes time to get used to touch controls
High quality stereo sound with deep bass No volume control on the earbuds themselves
Lightweight, comfortable and secure fit
IP7 waterproof
Smart touch controls
Great value for the price


When considering the sub $40 price point, the Rulefiss Q38 earbuds deliver tremendous value for money based on their features and performance:

  • The crisp, balanced sound rivals more expensive brands, with punchy bass and clear mids and highs that bring music to life. Users are impressed by the audio quality from such an affordable option.

  • A long battery life of up to 48 hours on a single charge is hard to find even among premium models costing over $100. You get days of continuous listening.

  • IP7 waterproofing, Bluetooth 5.3, and other features make these comparable to brands like Jabra, Jaybird, or Powerbeats that can cost 2-3 times more.

  • While high-end models may edge out in ultimate sound quality, the Rulefiss Q38 Wireless Earbuds hold their own very well, especially for sport use cases. The value proposition is very compelling.

  • At just $35-40 depending on discounts, the Rulefiss Q38 Wireless Earbuds deliver nearly 80% of the performance and features of elite brands for 20% of the price or less. That’s outstanding value.

  • For budget-conscious buyers or those new to wireless earbuds, the Rulefiss Q38 Wireless Earbuds are a great entry point that punches far above their weight without breaking the bank.


For their low price, the Rulefiss Q38 wireless earbuds offer great value with their sporty, comfortable design, solid Bluetooth connectivity, and pretty good sound. While not the best sounding or longest lasting, they have most of the features people want in a simple pair of workout earbuds. For casual gym-goers and runners on a budget, the Rulefiss Q38 Wireless Earbuds are an excellent and affordable option.


• Bluetooth version: 5.3
• Playtime: 6-8 hours
• Total playtime (with charging case): 48 hours
• Water resistance: IPX7 (fully waterproof)
• Driver size: 10mm
• Bluetooth range: 30 feet (10m)
• Charging time: 1.5 hours (earbuds), 2.5 hours (case)
• Battery capacity: Earbuds 45mAh, Charging case 800mAh
• Charging method: USB-C
• Weight: 5.5g per earbud, 40g charging case
• Warranty: 12 months

  What's in the  Rulefiss Q38 Box

What’s in the Box

The Rulefiss Q38 wireless earbuds include:

• Q38 wireless earbuds (left and right)
• Charging case
• 3 pairs of silicone ear tips (S, M, L)
• 3 pairs of ear hooks/wings
• USB-C charging cable
• Quick start guide

How to Use

Using the Q38 wireless earbuds is very straightforward:

  1. Charge the earbuds and case fully before first use.
  2. Select your desired ear tips and ear hook size for the best fit and comfort. The ear hooks help keep the buds secure.
  3. Hold both earbuds for a few seconds to power them on. They will automatically enter pairing mode.
  4. On your device (phone, tablet, laptop), find the “Rulefiss Q38” in the Bluetooth settings and tap to pair.
  5. The earbuds will announce “Connected” and you will hear a chime when pairing is successful.
  6. Use the touch controls on the earbuds to play/pause music, skip tracks, adjust volume, activate your voice assistant, and take calls.
  7. To power off, hold both earbud touch panels for a few seconds until you hear “Power off”. Place them in the charging case to charge when not in use.
  8. The charging case will recharge the earbuds when placed inside. Check the indicator lights on the case to see the case/earbud charge level. Recharge the case via USB-C when it’s low.

Frequently Asked Questions

  • Q1: How secure is the earhook fit? Can I use these earbuds for running or intense workouts?
  • A: The Rulefiss Q38 Wireless Earbuds feature adjustable earhooks made from soft TPU material, designed for flexibility and a secure fit during active use. Customer reviews generally confirm their stability during exercise.

  • Q2: Is the sound quality good for music, podcasts, and phone calls?

  • A: These earbuds boast 10mm drivers for decent bass and clear mids and highs. They’re ideal for podcasts and calls. Music lovers might prefer earbuds with a more customizable EQ for a richer soundscape.

  • Q3: Are the Rulefiss Q38 Wireless Earbuds truly waterproof?

  • A: Yes, they have an IP7 waterproof rating, meaning they can withstand sweat, rain, and accidental splashes. However, they are not designed for submersion in water.

  • Q4: How long do the earbuds last on a single charge, and what’s the total playtime with the case?

  • A: The Rulefiss Q38 Wireless Earbuds offer up to 6-8 hours of playtime per charge. The compact charging case extends this to an impressive 48 hours.

  • Q5: How easy is it to pair the earbuds with my smartphone, and can I use them independently?

  • A: These earbuds use Bluetooth 5.3 for fast and stable pairing. The “one-step pairing” feature makes the process simple. Additionally, you can use a single earbud while the other charges in the case.


  • Optimize the fit: Adjust the earhooks for the best combination of comfort and security.
  • Keep them clean: Regularly clean the magnet connectors on both the earbuds and case to ensure proper charging.
  • Master the touch controls: Familiarize yourself with the touch functions for music, calls, and activating your voice assistant.