Price: $22.99
(as of Jun 12, 2025 14:36:54 UTC – Details)

From the brand

Rulefiss is a smart device brand founded in 2018. We offer a wide range of products including smartwatches and Bluetooth earbuds, as well as Bluetooth smart devices such as Bluetooth speakers. We combine fashion and innovative technology to turn smart devices into carriers of personal style.

NEW Q38 Sport Earbuds

【360 Surround Hi-Fi Stereo Sound, Crystal Clear Calls】The 2025 model Rulefiss wireless headphones sport produce impressively beautiful sound, using an AAC/SBC audio decoder and a 14.2mm composite diaphragm to increase the audio frequency by 75% (18Hz-25kHz). Instrumental details are layered, vocals are clear, resonant bass and authentic highs ensure you feel pure music. At the same time, the Bluetooth headphones have built-in 4 clear microphones and ENC noise reduction technology, they can retain 80% of the sound, making the call clearer.
【2025 Upgraded Bluetooth 5.4】Rulefiss Q38 wireless earbuds sport uses Bluetooth 5.4 technology and dual-channel transmission. The Bluetooth earbuds offer enhanced anti-interference capabilities and optimized channel hopping mechanisms, effectively shielding against external interference. Compared with Bluetooth 5.3, the transmission speed is +100%, the stability is +70%, 41ms low latency.
【56 Hrs Playtime, Dual Power Display】The Bluetooth headphones in ear charging case with LED power display shows remaining power in percentage. Charging case presents its battery from 1%-100% to let you know the current power status of your running headphones and charging case anytime anywhere. Up to 6-8 hours playtime of normal usage on a single charge and boost that to 56 hours playtime with the 800mah compact charging case. With type-C quick charge, it only takes 1.5 hrs to charge the case.
【Comfortable Sports Earhooks, IP-X7 Waterproof】Unlike most sport headphones wireless, Q38 headphones are designed with a soft, ultra-light and flexible 45° earhook structure, which can fit your ears smoothly. And a single earbud is as light as 8g, equipped with 3 different sizes of high-quality silicone earplugs (S/M/L). Also with IP-X7 certified waterproof technology, you can protect the sport earbuds from sweat and rain during sports or daily use. Best choice for workout, running, gym.
【Smart Touch Control, Refined Appearance】Multi-function touch panel on each sport ear bud helps to play, pause, adjust volume, answer, end calls, activate siri and google assistant more convenient. In addition, the appearance of the sport headset is made of 100% glossy coating, with smooth lines, comfortable touch and exquisite appearance.
【Extensive Compatibility, Quick Connection】The wireless earphones for sports are compatible with almost all Bluetooth-enabled devices such as iOS, Android cellphones, TV, smart watches, PC, tablets, laptops, and more (Not compatible with gaming devices). After pairing the devices for the first time, the Bluetooth earphones will automaticall connect when you take them out of the charging case.