Rulefiss Wireless Sport Earbuds Bluetooth 5.3 IPX7

Rulefiss Q38 are Bluetooth 5.3 sport earbuds with earhooks that deliver 3D Hi‑Fi stereo, long battery life up to 48 hours with charging case, and IPX7 water resistance for workouts.

The Rulefiss Q38 Wireless Earbuds are built for active users who want powerful sound, reliable wireless connectivity, and a secure fit for running or gym sessions. They combine a 14.2mm composite diaphragm, AAC/SBC decoding, and dual mics with CVC 8.0 noise reduction so music and calls remain clear. The earbuds pair quickly via Bluetooth 5.3, fit comfortably with flexible earhooks, and the compact charging case extends listening time to two days.

How do these earbuds improve everyday listening and calls?

Q38 focuses on balanced audio and clearer voice pickup for calls. A large dynamic driver expands frequency response and AAC/SBC support preserves detail. Dual microphones paired with CVC 8.0 reduce ambient noise so callers hear you more clearly.

• 14.2mm composite diaphragm for richer bass and crisp highs
• AAC and SBC decoders to retain instrumental detail
• Two built‑in mics with CVC 8.0 noise reduction for clearer calls
• Wide 20Hz–20kHz frequency coverage for full-range sound

How reliable and fast is the wireless connection?

Using Bluetooth 5.3 with dual-channel transmission, the Q38 offers quicker pairing, lower latency, and stronger stability than older versions. It supports HSP, HFP, A2DP and AVRCP profiles, making it compatible across iOS, Android and Windows devices. After initial pairing, earbuds reconnect automatically on removal from the case.

• Bluetooth 5.3 for faster, more stable transmission and ~51ms low latency
• Dual‑channel transmission improves stereo fidelity and drop resistance
• Auto reconnects when removed from the charging case
• Compatible with smartphones, tablets, laptops and more

What charging and battery performance can I expect during workouts?

The compact 800mAh charging case extends total playback to about 48 hours while each earbud provides around 6–8 hours per single charge. A Type‑C quick‑charge port powers the case to full in approximately 1.5 hours, and a 10‑minute quick charge can add about two hours of listening time when you're short on time.

• Single earbud runtime: 6–8 hours typical per charge
• Charging case capacity: 800mAh for up to 48 hours combined playtime
• Type‑C fast charging; case fully charges in ~1.5 hours
• LED percentage display on case shows remaining battery at a glance

Will the sport design stay comfortable and secure during exercise?

Q38 uses a soft, flexible 45° earhook and lightweight 7g earbuds to stay comfortable through long sessions. Three sizes of silicone tips help you find the right seal, while IPX7 water resistance protects against sweat and rain, making these earbuds suitable for running and gym use.

• Ultra‑light 7g earbuds with flexible earhooks for stable fit
• Comes with S, M, L high‑quality silicone ear tips included
• IPX7 waterproofing for protection against sweat and showers
• Glossy, smooth exterior with touch controls for on‑the‑go operation

Who is this for: The Rulefiss Q38 is aimed at active listeners who need secure, sweat‑resistant earbuds with extended battery life and reliable Bluetooth performance. They're ideal for runners, gymgoers, commuters and anyone who wants clearer calls and fuller sound without bulky headphones. If you value a snug earhook fit, quick charging, and a refined appearance with touch controls, these sport earbuds are a practical choice.