{"indrexa_id":"8c77cc50-8eb4-51af-bfc6-38e33f3ca791","category_id":"wireless_earbuds","product_title":"Rulefiss Wireless Earbuds Bluetooth Headphones Sport, 5.3 Immersive HiFi Stereo Over-Ear Buds, 48Hrs Earphones in Ear with Earhooks, HD Mic, IP7 Waterproof Headset for Workout Running (Blue) (Q38)","brand":"Rulefiss","upc":null,"asin":"B0C57SK1WP","semantic_description":"The Rulefiss Q38 are budget-priced ($35.99) true wireless earbuds featuring Bluetooth 5.3, 13mm graphene drivers, and IP67 waterproofing with earhook stabilizers designed for active use. They offer up to 8 hours of playback per charge and 48 hours total with the USB-C charging case, dual microphones with CVC 8.0 noise reduction, and touch controls with voice assistant support. They lack active noise cancellation and wireless case charging, making them less suitable for commuters or audiophiles seeking premium sound isolation.","best_for_summary":"Best for budget-conscious fitness enthusiasts who need secure-fit, sweat-resistant wireless earbuds with long total battery life for running, gym sessions, and casual calls.","not_ideal_for":["audiophiles seeking high-fidelity sound","users needing active noise cancellation","those wanting wireless/Qi case charging"],"use_case_tags":["running","gym","workout","calls","budget-friendly"],"buyer_profile_tags":["fitness-focused","budget-conscious","casual-listener"],"manufacturer_description":"【2023 New Bluetooth 5.3】The Bluetooth 5.3 chip and high-sensitivity FPC antenna ensure that the headphones connects quickly and stably within 15 meters, with lower latency and lower power consumption. Supports Bluetooth protocols such as HSP, HFP, A2DP and AVRCP. After pairing the devices for the first time, the Bluetooth headphones will automatically connect when you take them out of the charging case.【13mm Drivers Stereo Sound, Crystal Clear Calls】Rulefiss New Q38 wireless earbuds Bluetooth uses AAC/SBC audio decoder and 13mm graphene moving coil unit, and the frequency bandwidth is increased by 45%. Instruments are well-detailed, mids are full, and high pitch (20Hz-20kHz) is punchier, with excellent dynamic range and accuracy. At the same time, the Bluetooth earbuds have built-in 2 clear microphones and CVC 8.0 technology, they can retain 85% of the sound, making the call clearer.【48 Hrs Battery, Dual LED Display】Our wireless earphones over 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 48 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, IP7 Waterproof】Unlike most sport headphones, Q38 sport wireless 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 7g, equipped with 3 different sizes of high-quality silicone earplugs (S/M/L). Also with IP7 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, Wide Compatibility】Multi-function touch panel on each earphone helps to play, pause, adjust volume, answer, end calls, activate siri and google assistant more convenient. This Bluetooth earphones is compatible with smartphones, tablets and laptops that use iOS 9.0/Android 5.0 or later. Therefore, no tangled wires are bothered, and you will enjoy the convenience brought by these sport earphones.Compatible Devices: For iOS Phones. For Android Phones: Samsung, Huawei, Xiaomi, ZTE, Lenovo, OPPO, Vivo,SONY, HTC, LG, and other smartphones with iOS 9.0/Android 5.0 or above and Bluetooth 4.0 or later.Included Components: USB-C cable * 1","feature_bullets":["【2023 New Bluetooth 5.3】The Bluetooth 5.3 chip and high-sensitivity FPC antenna ensure that the headphones connects quickly and stably within 15 meters, with lower latency and lower power consumption. Supports Bluetooth protocols such as HSP, HFP, A2DP and AVRCP. After pairing the devices for the first time, the Bluetooth headphones will automatically connect when you take them out of the charging case.","【13mm Drivers Stereo Sound, Crystal Clear Calls】Rulefiss New Q38 wireless earbuds Bluetooth uses AAC/SBC audio decoder and 13mm graphene moving coil unit, and the frequency bandwidth is increased by 45%. Instruments are well-detailed, mids are full, and high pitch (20Hz-20kHz) is punchier, with excellent dynamic range and accuracy. At the same time, the Bluetooth earbuds have built-in 2 clear microphones and CVC 8.0 technology, they can retain 85% of the sound, making the call clearer.","【48 Hrs Battery, Dual LED Display】Our wireless earphones over 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 48 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, IP7 Waterproof】Unlike most sport headphones, Q38 sport wireless 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 7g, equipped with 3 different sizes of high-quality silicone earplugs (S/M/L). Also with IP7 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, Wide Compatibility】Multi-function touch panel on each earphone helps to play, pause, adjust volume, answer, end calls, activate siri and google assistant more convenient. This Bluetooth earphones is compatible with smartphones, tablets and laptops that use iOS 9.0/Android 5.0 or later. Therefore, no tangled wires are bothered, and you will enjoy the convenience brought by these sport earphones.","Compatible Devices: For iOS Phones. For Android Phones: Samsung, Huawei, Xiaomi, ZTE, Lenovo, OPPO, Vivo,SONY, HTC, LG, and other smartphones with iOS 9.0/Android 5.0 or above and Bluetooth 4.0 or later.","Included Components: USB-C cable * 1"],"spec_table":[{"field":"Brand","value":"Rulefiss"},{"field":"Color","value":"pure navy blue"},{"field":"Ear Placement","value":"Over Ear"},{"field":"Form Factor","value":"In Ear"},{"field":"Wireless Communication Technology","value":"Bluetooth"}],"bought_in_past_month":"50+","variants":["B0C57SK1WP","B0FKGSLPCT","B0DPW3P9VY","B0CMWFVV15","B0DX7936H7","B0CRNB4DS4","B0CHYD2X8X"],"shipping_amount":"FREE","manufacturer":"Rulefiss","climate_pledge_friendly":true,"category_specs":{"is_multipoint":false,"is_stem_design":false,"has_touch_controls":true,"has_transparency_mode":false,"has_wireless_charging":false,"case_battery_life_hours":48,"has_ear_tips_multiple_sizes":true,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":23315,"average_rating":4.3,"rating_distribution":{"1_star":"7%","2_star":"4%","3_star":"6%","4_star":"14%","5_star":"69%"},"top_positive_themes":["Sound quality (34)","Comfort (23)","Fit (22)","Value for money (22)","Quality (16)"],"top_negative_themes":[],"top_mixed_themes":["Battery life (33)","Reliability (26)","Connectivity (16)"],"review_summary":"Customers find these wireless earbuds offer good sound quality, comfort, and secure fit that stays in place, making them great value for money. The earbuds receive positive feedback for their build quality, with one customer noting they're particularly suitable for physical activity. The battery life and connectivity receive mixed reviews - while some say the charge lasts a long time and connect easily, others report the charger stops working after 30 days and the right earbud doesn't work at all.","reliability_score":"high"},"best_offer":{"retailer":"amazon","retailer_id":"B0C57SK1WP","price_usd":35.99,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/rulefiss-rulefiss-wireless-earbuds-bluetooth-8c77cc50/amazon","in_stock":true,"shipping":{"free_shipping_available":null,"free_shipping_note":null,"min_order_for_free_shipping":null},"last_updated":"2026-06-03T20:04:52.021051+00:00"},"all_offers":[{"retailer":"amazon","retailer_id":"B0C57SK1WP","price_usd":35.99,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/rulefiss-rulefiss-wireless-earbuds-bluetooth-8c77cc50/amazon","in_stock":true,"shipping":{"free_shipping_available":null,"free_shipping_note":null,"min_order_for_free_shipping":null},"last_updated":"2026-06-03T20:04:52.021051+00:00"}],"_llm_hints":{"best_offer_logic":"lowest price among in-stock offers","out_of_stock_offers_included":true,"use_affiliate_url":"always use affiliate_url field, never construct retailer URLs manually","shipping_note":"shipping costs are estimates only — final cost depends on user location and membership status","null_fields":"null spec or review fields mean data was unavailable from source — do not infer values","manufacturer_description":"brand's own product description — official copy from Amazon listing","feature_bullets":"array of manufacturer's bullet-point features from Amazon listing","spec_table":"raw structured spec table from Amazon — category-specific technical specs","bought_in_past_month":"Amazon demand signal — number of units sold in past 30 days","variants":"array of ASINs for color/size variants of this product","shipping_amount":"shipping cost signal — FREE indicates free shipping available","climate_pledge_friendly":"Amazon Climate Pledge Friendly badge — sustainability certification","data_freshness":"checked_at timestamp from most recent price record","best_offer_null_means":"all known offers are currently out of stock — check all_offers for availability"},"json_ld":{"@context":"https://schema.org","@type":"Product","name":"Rulefiss Wireless Earbuds Bluetooth Headphones Sport, 5.3 Immersive HiFi Stereo Over-Ear Buds, 48Hrs Earphones in Ear with Earhooks, HD Mic, IP7 Waterproof Headset for Workout Running (Blue) (Q38)","brand":{"@type":"Brand","name":"Rulefiss"},"description":"The Rulefiss Q38 are budget-priced ($35.99) true wireless earbuds featuring Bluetooth 5.3, 13mm graphene drivers, and IP67 waterproofing with earhook stabilizers designed for active use. They offer up to 8 hours of playback per charge and 48 hours total with the USB-C charging case, dual microphones with CVC 8.0 noise reduction, and touch controls with voice assistant support. They lack active noise cancellation and wireless case charging, making them less suitable for commuters or audiophiles seeking premium sound isolation.","sku":"8c77cc50-8eb4-51af-bfc6-38e33f3ca791","identifier":[{"@type":"PropertyValue","name":"asin","value":"B0C57SK1WP"},{"@type":"PropertyValue","name":"indrexa_id","value":"8c77cc50-8eb4-51af-bfc6-38e33f3ca791"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/rulefiss-rulefiss-wireless-earbuds-bluetooth-8c77cc50/amazon","priceCurrency":"USD","price":35.99,"availability":"https://schema.org/InStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"aggregateRating":{"@type":"AggregateRating","ratingValue":4.3,"reviewCount":23315}}}