{"indrexa_id":"d4110945-e57a-5ea6-ad57-13a3ccf819d0","category_id":"wireless_earbuds","product_title":"Back Bay Audio Duet 50 Pro – Sweatproof Wireless Bluetooth Earbuds, 130 Hour Long Battery Life for iPhone, Android, Mini Charging Case, TWS Headphones with Microphone, Gift for Runners","brand":"Back Bay Audio","upc":null,"asin":"B085VL4FLB","semantic_description":"The Back Bay Audio Duet 50 Pro are true wireless in-ear Bluetooth earbuds featuring an exceptional total battery life of 130 hours (8 hours per earbud charge, 122 additional hours from the USB-C charging case), dual microphones for phone calls, and IPX-5 sweat resistance suited for running and workouts. The case doubles as a portable phone charger compatible with both iPhone and Android devices, and the earbuds are tuned for strong bass, natural midrange, and crisp highs. Connectivity reliability has received mixed feedback from users, with some reporting pairing issues.","best_for_summary":"Best for fitness enthusiasts and runners who prioritize exceptionally long battery life, sweat resistance, and clear call quality in a compact true wireless earbud package.","not_ideal_for":["Swimmers or those needing full waterproofing (IPX-5 only, not submersible)","Users who rely on active noise cancellation or transparency mode","Those who need stable, consistent Bluetooth connectivity for critical use"],"use_case_tags":["running","gym","workout","calls","gift"],"buyer_profile_tags":["fitness-focused","casual-listener","gift-buyer"],"manufacturer_description":"[130 Hours of Battery Life] Enough battery for any adventure! These long lasting bluetooth headphones can play music for 8 hours straight, and the charging case holds 122 more hours of playtime. A single charge of the case with a USB-C cable can power 130 total hours[Dual Microphones – Clear Phone Calls] Take wireless phone calls and control your music on your iPhone or Android. These are the best Bluetooth earbuds with mic, wireless mic for cordless phone calls. The bluetooth earbuds battery life is also stellar[Back Bay Signature Sound] These long battery life earbuds are tuned in our Boston HQ to produce the rich tone of the classic American hi-fi stereos - strong bass, natural midrange, and crisp highs. The Duet 50 Pro’s have a full, vibrant sound[Sweatproof] Not only are the Duet 50 Pro’s long lasting headphones, they are fully sweatproof and can handle long runs in the rain and snow. The bluetooth wireless earbuds nano-coating creates IPX-5 rated sweat-proofing [NOTE: Not for Swimming][Charges Your Cell Phone] Just plug in the included charging converter cable to the case, and you can charge any kind of iPhone or Android. The small earbuds (audifonos bluetooth inalambricos pequeños) can be an extra power source for your cell phone","feature_bullets":["[130 Hours of Battery Life] Enough battery for any adventure! These long lasting bluetooth headphones can play music for 8 hours straight, and the charging case holds 122 more hours of playtime. A single charge of the case with a USB-C cable can power 130 total hours","[Dual Microphones – Clear Phone Calls] Take wireless phone calls and control your music on your iPhone or Android. These are the best Bluetooth earbuds with mic, wireless mic for cordless phone calls. The bluetooth earbuds battery life is also stellar","[Back Bay Signature Sound] These long battery life earbuds are tuned in our Boston HQ to produce the rich tone of the classic American hi-fi stereos - strong bass, natural midrange, and crisp highs. The Duet 50 Pro’s have a full, vibrant sound","[Sweatproof] Not only are the Duet 50 Pro’s long lasting headphones, they are fully sweatproof and can handle long runs in the rain and snow. The bluetooth wireless earbuds nano-coating creates IPX-5 rated sweat-proofing [NOTE: Not for Swimming]","[Charges Your Cell Phone] Just plug in the included charging converter cable to the case, and you can charge any kind of iPhone or Android. The small earbuds (audifonos bluetooth inalambricos pequeños) can be an extra power source for your cell phone"],"spec_table":[{"field":"Brand","value":"Back Bay Audio"},{"field":"Color","value":"Black"},{"field":"Ear Placement","value":"In Ear"},{"field":"Form Factor","value":"In Ear"},{"field":"Impedance","value":"16 Ohms"}],"bought_in_past_month":null,"variants":null,"shipping_amount":null,"manufacturer":"Back Bay Audio","climate_pledge_friendly":true,"category_specs":{"is_multipoint":false,"is_stem_design":false,"has_touch_controls":false,"has_transparency_mode":false,"has_wireless_charging":false,"case_battery_life_hours":130,"has_ear_tips_multiple_sizes":false,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":2853,"average_rating":4.3,"rating_distribution":{"1_star":"7%","2_star":"4%","3_star":"7%","4_star":"14%","5_star":"68%"},"top_positive_themes":["Sound quality (484)","Battery life (346)","Quality (290)","Value for money (245)","Fit (224)","Comfort (139)"],"top_negative_themes":[],"top_mixed_themes":["Reliability (138)","Connectivity (134)"],"review_summary":"Customers find these earbuds impressive, with great sound quality, outstanding battery life, and secure fit that stays in place during workouts. They are comfortable, allowing wear for hours without discomfort, and customers consider them good value for money. The reliability and connectivity receive mixed feedback - while some say they function well and pair instantly with phones, others report that they stop working entirely and don't connect consistently.","reliability_score":"mixed"},"best_offer":null,"all_offers":[{"retailer":"amazon","retailer_id":"B085VL4FLB","price_usd":null,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/back-bay-audio-duet-50-pro-sweatproof-d4110945/amazon","in_stock":false,"shipping":{"free_shipping_available":null,"free_shipping_note":null,"min_order_for_free_shipping":null},"last_updated":"2026-07-18T08:45:55.660074+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":"Back Bay Audio Duet 50 Pro – Sweatproof Wireless Bluetooth Earbuds, 130 Hour Long Battery Life for iPhone, Android, Mini Charging Case, TWS Headphones with Microphone, Gift for Runners","brand":{"@type":"Brand","name":"Back Bay Audio"},"description":"The Back Bay Audio Duet 50 Pro are true wireless in-ear Bluetooth earbuds featuring an exceptional total battery life of 130 hours (8 hours per earbud charge, 122 additional hours from the USB-C charging case), dual microphones for phone calls, and IPX-5 sweat resistance suited for running and workouts. The case doubles as a portable phone charger compatible with both iPhone and Android devices, and the earbuds are tuned for strong bass, natural midrange, and crisp highs. Connectivity reliability has received mixed feedback from users, with some reporting pairing issues.","sku":"d4110945-e57a-5ea6-ad57-13a3ccf819d0","identifier":[{"@type":"PropertyValue","name":"asin","value":"B085VL4FLB"},{"@type":"PropertyValue","name":"indrexa_id","value":"d4110945-e57a-5ea6-ad57-13a3ccf819d0"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/back-bay-audio-duet-50-pro-sweatproof-d4110945/amazon","priceCurrency":"USD","price":null,"availability":"https://schema.org/OutOfStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"aggregateRating":{"@type":"AggregateRating","ratingValue":4.3,"reviewCount":2853}}}