Description
Liberty 4 Pro at a glance
Anker’s Liberty 4 Pro true-wireless earbuds combine multi-sensor active noise cancellation, ACAA high-fidelity tuning, and a smart charging case so you can listen and take calls in noisy commutes, offices, and travel without constantly reaching for your phone.
Active noise cancellation
Seven sensors pick up sound from every direction for reduction that Anker rates at three times stronger—useful on planes, trains, and crowded streets. Adaptive processing updates roughly every 0.3 seconds so cancellation tracks a changing environment in real time.
Case controls
Adjust noise-cancelling intensity from the charging case: a touch bar and built-in display respond to a simple swipe, so level changes stay hands-free while the buds stay in your ears.
Sound system
ACAA architecture uses a 10.5 mm driver with a titanium-coated tweeter and a digital crossover for crisp, full-bodied playback across genres—from punchy tracks to detailed classical passages.
Voice calls
Six microphones, a noise-cancelling algorithm, and wind noise reduction work together for clearer call audio outdoors and in busy indoor spaces.
Power and charging
| Earbuds alone | Up to 10 hours playback per charge |
| With charging case | Up to 40 hours total |
| Quick top-up | About 5 minutes on the charger for up to 4 hours listening; supports charging up to 2× faster than prior generations |
Wear and carry
Lightweight, ergonomic housings stay put during movement, and multiple ear tip sizes help you seal comfortably for workouts, long commutes, or extended sessions at home. The compact case slips into a bag for storage and daily carry.
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