Rulefiss Q38 Wireless Earbuds Bluetooth 5.3 Sport

Rulefiss Q38 Wireless Earbuds are sport-focused Bluetooth 5.3 headphones with earhooks, IP7 waterproofing, 48 hours total battery life and tuned 3D stereo sound for workouts and daily use.

These earbuds combine a large 14.2mm driver, AAC/SBC decoding and dual microphones with CVC 8.0 noise reduction to deliver clear music and call performance. The Q38 set pairs automatically, shows precise battery percentage on a dual LED display, and uses a flexible 45° earhook plus three silicone tip sizes to stay secure during runs, gym sessions or commuting. Lightweight construction, fast Type-C charging and broad device compatibility make them practical for phones, tablets and laptops.

How do the Q38 earbuds improve sound and call clarity?

The Q38 prioritizes balanced audio and intelligible voice calls. A 14.2mm composite diaphragm gives fuller lows and crisp highs while AAC/SBC support refines digital playback. Dual onboard microphones with CVC 8.0 reduce background noise so callers and listeners hear more of the voice and less ambient sound.

• 3D stereo tuning with increased audio frequency range (20Hz–20kHz)
• AAC and SBC decoding for clearer streaming across devices
• Two microphones plus CVC 8.0 noise suppression for clearer calls

What makes the Q38 reliable for sports and outdoor use?

Design choices focus on stability and durability during movement and moisture exposure. The soft, ultra-light 45° earhook adapts to ear shape, and a single earbud weighs about 7g for extended comfort. IP7 waterproofing protects against sweat and rain so you can train without worry.

• Flexible earhook design for secure fit while running or at the gym
• Three silicone tip sizes (S/M/L) for a personalized seal
• IP7-rated protection against sweat and light water exposure

How long does the battery last and how fast does it charge?

The Q38 delivers a full-day-plus battery experience thanks to an 800 mAh charging case that extends playtime up to 48 hours. Single-earbud runtime is typically 6–8 hours depending on volume and usage. The case recharges quickly via Type-C in about 1.5 hours and shows remaining power as a percent on a dual LED display for accurate monitoring.

• 6–8 hours per single charge; up to 48 total hours with charging case
• 800 mAh compact case with dual LED percentage display
• Fast Type-C charging; case fully charges in ~1.5 hours

Are these earbuds easy to use with different devices?

Yes — Bluetooth 5.3 and dual-channel transmission improve connection speed and stability, lowering latency for media and calls. They support standard Bluetooth profiles (HSP, HFP, A2DP, AVRCP) so they work with iOS, Android and Windows systems. Smart touch controls let you manage playback, volume and voice assistants hands-free.

• Bluetooth 5.3 with ~100ms low latency and improved stability
• Automatic reconnection after first pairing with the charging case
• Touch controls for play/pause, volume, calls and voice assistant access

Who is this for: The Rulefiss Q38 is aimed at active users who want a secure, weather-resistant earbud that balances strong bass with clear mids and voice pickup. It suits runners, gym-goers, commuters and anyone needing long battery life with quick charging and simple touch controls. If you prioritize a snug fit, reliable call performance and multi-day battery backup without bulky over-ear cups, the Q38 offers a compact, sport-ready solution.