Soundcore by Anker Liberty 4, Noise Cancelling Earbuds, True Wireless Earbuds with ACAA 3.0, Dual Dynamic Drivers for Hi-Res Premium Sound, Spatial Audio with Dual Modes, Heart Rate Sensor (Renewed)

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PRODUCT OVERVIEWSoundcore by Anker Liberty 4, Noise Cancelling Earbuds, True Wireless Earbuds with ACAA 3.0, Dual Dynamic Drivers, Hi-Res Audio, Heart Rate Sensor, CloudComfort Eartips, Spatial Audio, 28H PlaytimeKEY FEATURESPremium Sound via ACAA 3.0 - Enjoy sound with deep, punchy bass, accurate mids, and clear treble direct from our acoustic system's dual dynamic drivers. It's wide soundstage allows every part of the song to shine for detail-rich listening.Immersive Spatial Audio - As you listen to music and watch movies, the built-in gyroscope and spatial audio algorithm track your head movements to always keep you at the heart of the sound for a completely immersive experience.Heart Rate Tracking - The in-ear heart rate sensor tracks you heart rate as you listen throughout the day. Check your daily data, use while working out, and more via soundcore Wellness in the app.Personalized Sound - Soundcore's unique technology analyzes your ears and the way you hear sound to create a personalized sound profile that's unique to your ears.CloudComfort Ear Tips - The dual-layer structure adapts to the shape of your ear canal for a pressure-free fit for the full 9 hours of playtime. Includes 4 sizes of ear tips to ensure you find the right fit for you.Crisp, Clear Sound - With dual dynamic drivers, Liberty 4 delivers crisp and clear sound.Outstanding Performance - Two dynamic drivers aligned on the same axis produce high-res sound with 3x more clarity**Compared with Liberty 2 Pro True Wireless EarbudsHear Every Detail - Hear every detail from the deepest, punchiest bass to the highest treble thanks to the wide soundstage.Hear the Unexpected - Premium sound quality allows you to rediscover old favorites and create new musical memories.360° of Immersion - Put yourself at the heart of the music or movie as sound surrounds you from all directions.Music and Movie Modes - The built-in gyroscope and spatial audio algorithm tailor the sound to the content you're