Anker Soundcore Liberty 4

Anker Soundcore Liberty 4 — ACAA 3.0 Dual Dynamic Drivers & 360° Spatial Audio with Heart Rate Sensor

Experience flagship acoustic precision with the Anker Soundcore Liberty 4 (Model: A3953). Featuring upgraded ACAA 3.0 coaxial dual dynamic drivers and LDAC Hi-Res Audio Wireless support, these true wireless earbuds deliver detail-rich sound with deep bass and crisp treble. Packed with 360° Spatial Audio featuring real-time dynamic head tracking, CloudComfort dual-layer ear tips, an in-ear heart rate monitoring sensor, HearID personalized EQ, and Ultra Noise Cancelling 2.0, they combine premium audio performance with all-day health tracking.

Key Specifications

• Product Name & Model: Anker Soundcore Liberty 4 (Model: A3953 / A3953Z11)

• Acoustic Architecture: Upgraded ACAA 3.0 (Astria Coaxial Acoustic Architecture) Dual Dynamic Drivers Coaxial Setup

• Audio Codecs & Resolution: LDAC, AAC, SBC | Hi-Res Audio Wireless Certified (3× Detail Transmission via LDAC)

• Active Noise Cancellation: Ultra Noise Cancelling 2.0 (Adapts dynamically to ambient noise levels & ear canal geometry)

• Immersive Audio: 360° Spatial Audio with Dynamic Head Tracking (Dedicated Music & Movie Spatial Modes)

• Health & Wellness Sensors: In-Ear Heart Rate Monitoring Sensor, Daily Stress Check, & Posture Alert via Soundcore Wellness App

• Call Quality: 6 Beamforming Microphones with AI Noise Reduction Algorithm

• Wireless Connectivity: Bluetooth 5.3 | Multipoint Dual-Device Connection Support

• Battery Life & Playback:

  • Single Earbud Playback: Up to 9 Hours (ANC Off) / 7 Hours (ANC On) / 5 Hours (LDAC Mode)

  • Total Playback with Case: Up to 28 Hours (ANC Off) / 24 Hours (ANC On)

  • Fast Charging: 15-Minute USB-C Charge provides 3 Hours of Music Playback

• Charging Interface: USB Type-C & Wireless Charging Compatible Case

• Fit & Comfort: CloudComfort Flexible Dual-Layer Silicone Ear Tips (4 Sizes included: S / M / M- / L)

• Water Resistance Rating: IPX4 Water & Sweat Resistance (Earbuds only)

• Colors: Midnight Black

Product Highlights

• ACAA 3.0 Dual Dynamic Drivers: Coaxial dual drivers reproduce rich acoustic detail, punchy bass, and crystal-clear vocals across an expanded frequency spectrum.

• 360° Spatial Audio with Head Tracking: Built-in gyroscope tracks head movement to surround you with cinematic 3D soundscapes tailored for music and movies.

• In-Ear Heart Rate & Wellness Tracking: Monitors heart rate, stress levels, and posture reminders throughout the day directly via the Soundcore app.

• Ultra Noise Cancelling 2.0: Automatically optimizes noise reduction intensity based on your immediate surrounding environment.

• CloudComfort Ear Tips & 28-Hour Battery: Soft dual-layer silicone ear tips deliver pressure-free long wear, backed by up to 28 hours of total playback time.

What's in the Box

• Soundcore Liberty 4 Earbuds (Left & Right)

• Smart Charging Case

• 4 Sizes of CloudComfort Ear Tips (S / M / M- / L)

• USB Type-C Charging Cable

• Quick Start Guide & Safety Manual