{"product_id":"sk-ultra-thin-sleep-headphones-5-3-wireless-bluetooth-headset-invisible-earbuds-hidden-in-ear-button-sports-earphones-waterproof","title":"Calena WHISPER Ultra-Slim Wireless Sleep Earbuds","description":"\u003cp\u003e\u003cstrong\u003eRelax and unwind with the Calena WHISPER\u003c\/strong\u003e, engineered for side sleepers who want music, podcasts, or sleep meditations without giant headphones pressing into their ears all night. Bluetooth 5.3, active noise cancellation, true-wireless earbuds slim enough to disappear into your ear — up to 480 hours of standby on a single charge case.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt for restorative sleep\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eULTRA-SLIM IN-EAR PROFILE:\u003c\/strong\u003e Low-profile design sits flush against the ear canal — comfortable for side sleeping without the pressure pain of standard earbuds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBLUETOOTH 5.3 + ACTIVE NOISE CANCELLATION:\u003c\/strong\u003e Latest Bluetooth standard for stable, low-latency connection. ANC actively blocks ambient noise so quiet audio sounds clean.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e480-HOUR STANDBY BATTERY:\u003c\/strong\u003e 300mAh charging case keeps the earbuds topped up for weeks of nightly use. ~1 hour to fully recharge.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHYBRID DRIVER TECHNOLOGY:\u003c\/strong\u003e 14mm neodymium drivers with hybrid vocalism principle produce balanced sound across voice, ambient, and music content. 20–20,000 Hz frequency response.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIPX WATERPROOF + VOICE ASSISTANT:\u003c\/strong\u003e Sweat and weather-resistant for gym use. Apple Siri support and built-in microphone for hands-free calls.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE \/ FCC \/ RoHS CERTIFIED:\u003c\/strong\u003e Tested and certified for safety, electromagnetic compatibility, and chemical compliance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMade for\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eSide sleepers.\u003c\/strong\u003e The ultra-slim profile is engineered to lie flat against the ear without pressing in when your head is on a pillow.\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eSleep-meditation listeners.\u003c\/strong\u003e ANC + Bluetooth 5.3 delivers clean, low-latency audio for Calm, Headspace, or your sleep-story app of choice.\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eTravelers.\u003c\/strong\u003e Slim charging case fits in any pocket. Ultra-quiet flight mode through ANC. 480h standby covers a full trip.\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eDaytime professionals who want one device.\u003c\/strong\u003e Sleep with them at night, calls during the day, workouts at lunch. IPX waterproof handles all of it.\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBluetooth version\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible with\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eiOS, Android, Windows, macOS\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery (case)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300mAh \/ 480-hour standby\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharging port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB Type-C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDrivers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14mm neodymium, hybrid technology\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCodecs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAAC, SBC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20–20,000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 g (case + buds)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e105 × 95 × 30 mm (case)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWaterproof rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIPX\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 10 m\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE, FCC, RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIn the box\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEarbuds, charging case, USB Type-C cable, user manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently asked\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003e\u003cstrong\u003eAre they really comfortable for side sleeping?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe ultra-slim profile is engineered specifically for it — they sit flush enough that a pillow doesn't push them painfully into the ear canal.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eHow long do they play music before recharging?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe earbuds themselves typically play for several hours per charge; the case extends total playtime to many days of typical use.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eWill they fall out at night?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe in-ear seal holds the buds in place through typical side-sleeping movement.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eCan I take calls with them?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eYes — built-in microphone supports voice calls and voice assistants (Siri).\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eWhat if I don't love them?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eReturn within 60 nights. 60-Night Drift Trial, full refund, no questions asked.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eThe 60-Night Drift Trial\u003c\/h2\u003e\n\u003cp\u003eSleep with the WHISPER for 60 nights. If they don't replace whatever earbuds are currently next to your bed, send them back — no questions asked. Free US shipping.\u003c\/p\u003e","brand":"Calena","offers":[{"title":"Bone \/ United States","offer_id":48546302132379,"sku":"14:366#White;200007763:201336106","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Onyx \/ United States","offer_id":48546302165147,"sku":"14:175#Black;200007763:201336106","price":99.99,"currency_code":"USD","in_stock":true},{"title":"Sand \/ United States","offer_id":48546302197915,"sku":"14:193#khaki;200007763:201336106","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/0923\/3819\/files\/S0410badb454e4b03bc30951dbfce9e79B.webp?v=1778536050","url":"https:\/\/calena-6.myshopify.com\/products\/sk-ultra-thin-sleep-headphones-5-3-wireless-bluetooth-headset-invisible-earbuds-hidden-in-ear-button-sports-earphones-waterproof","provider":"Calena","version":"1.0","type":"link"}