{"indrexa_id":"ebd2e5d3-c6b4-56d3-95a7-1515338eb712","category_id":"headphones","product_title":"Sennheiser CX 300S In Ear Headphone with One-Button Smart Remote - Red","brand":"Sennheiser","upc":"615104327825","asin":"B07N9J4BTK","semantic_description":"The Sennheiser CX 300S are wired in-ear headphones featuring an 18-ohm impedance and Sennheiser's transducer technology designed to deliver detailed sound reproduction with enhanced bass response. They include a one-button inline smart remote with microphone for music playback control and call handling, and come with four ear tip sizes (XS, S, M, L) for a customizable fit. Passive noise isolation is achieved through the in-ear design, though some users report comfort and fit issues that may cause the earbuds to slip out.","best_for_summary":"Best for everyday listeners and commuters who want a reliable wired in-ear option from a reputable audio brand with hands-free call capability and a secure passive noise-isolating fit.","not_ideal_for":["Users with ear canal shapes that struggle to retain in-ear tips securely","Those needing active noise cancellation for loud environments","Users seeking long-term durability, as some report failures within a few months"],"use_case_tags":["commuting","calls","budget-friendly","travel","noise-cancelling"],"buyer_profile_tags":["commuter","casual-listener","budget-conscious"],"manufacturer_description":"Boost your sound with Sennheiser’s CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheiser’s transducer technology. S, M, L) to choose from. A Smart remote enables you to play/pause music and take calls across all devices.","feature_bullets":["Precision German engineering ensures excellent audio clarity, so you will hear every detail of your music","Product Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ears","One button inline smart remote makes it convenient to play and pause music and take calls without needing to fumble with your phone","Four sizes (XS, S, M, L) of ear adapters are included so you can get an individualized fit for personal comfort","In ear design creates a secure fit for excellent reduction of ambient noise so you can relax and focus on the music"],"spec_table":[{"field":"Brand","value":"Sennheiser"},{"field":"Color","value":"Red"},{"field":"Ear Placement","value":"In Ear"},{"field":"Form Factor","value":"In Ear"},{"field":"Impedance","value":"18 Ohms"}],"bought_in_past_month":"50+","variants":["B07N9J4BTK","B07NFQX75J","B07N1YLC23"],"shipping_amount":"FREE","manufacturer":"Sennheiser","climate_pledge_friendly":false,"category_specs":{"is_foldable":false,"is_wireless":false,"is_open_back":false,"impedance_ohms":18,"has_wired_option":true,"has_transparency_mode":false,"has_multipoint_connection":false,"has_active_noise_cancellation":false},"review_intelligence":{"total_reviews":6934,"average_rating":4.2,"rating_distribution":{"1_star":"7%","2_star":"5%","3_star":"9%","4_star":"17%","5_star":"62%"},"top_positive_themes":["Quality (113)","Value for money (93)"],"top_negative_themes":[],"top_mixed_themes":["Sound quality (289)","Comfort (74)","Fit (60)","Noise cancellation (59)","Durability (53)","Reliability (36)"],"review_summary":"Customers find these headphones to be well-made and good value for money, with crystal clear highs and excellent sound for the price. The comfort, fit, noise cancellation, durability, and reliability receive mixed feedback - while some find them comfortable and well-fitting with excellent noise cancellation, others report discomfort, slipping out of the ears, below-par passive noise isolation, and premature failure after three months of use.","reliability_score":"mixed"},"best_offer":{"retailer":"amazon","retailer_id":"B07N9J4BTK","price_usd":49.4,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/sennheiser-cx-300s-in-ear-ebd2e5d3/amazon","in_stock":true,"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"},"all_offers":[{"retailer":"amazon","retailer_id":"B07N9J4BTK","price_usd":49.4,"original_price_usd":null,"affiliate_url":"https://www.indrexa.com/go/sennheiser-cx-300s-in-ear-ebd2e5d3/amazon","in_stock":true,"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":"Sennheiser CX 300S In Ear Headphone with One-Button Smart Remote - Red","brand":{"@type":"Brand","name":"Sennheiser"},"description":"The Sennheiser CX 300S are wired in-ear headphones featuring an 18-ohm impedance and Sennheiser's transducer technology designed to deliver detailed sound reproduction with enhanced bass response. They include a one-button inline smart remote with microphone for music playback control and call handling, and come with four ear tip sizes (XS, S, M, L) for a customizable fit. Passive noise isolation is achieved through the in-ear design, though some users report comfort and fit issues that may cause the earbuds to slip out.","sku":"ebd2e5d3-c6b4-56d3-95a7-1515338eb712","identifier":[{"@type":"PropertyValue","name":"asin","value":"B07N9J4BTK"},{"@type":"PropertyValue","name":"indrexa_id","value":"ebd2e5d3-c6b4-56d3-95a7-1515338eb712"}],"offers":[{"@type":"Offer","url":"https://www.indrexa.com/go/sennheiser-cx-300s-in-ear-ebd2e5d3/amazon","priceCurrency":"USD","price":49.4,"availability":"https://schema.org/InStock","seller":{"@type":"Organization","name":"Amazon"}}],"additionalProperty":[],"gtin":"615104327825","aggregateRating":{"@type":"AggregateRating","ratingValue":4.2,"reviewCount":6934}}}