Headset Anker Liberty 4 Pro — In-ear TWS Bluetooth, USB Type-C, Black, for Calls, Music, Sport

Anker Liberty 4 Pro are in-ear True Wireless Stereo (TWS) earbuds in black with USB Type-C charging, designed for calls, music, sport and everyday use. The compact, cord-free design uses intraaural ear coupling for a stable fit during movement and integrates multi-sensor adaptive noise cancelling, fast charging and high-fidelity audio components to support extended listening and clear voice calls.

Advantages

Liberty 4 Pro combines multi-sensor precise noise cancellation that recalibrates in real time with a high-performance driver system for detailed sound. The earbuds offer fast charging for quick top-ups, a wearable in-ear form factor for stable fit during activity, and a TWS Bluetooth connection for wireless freedom. Built-in microphones and an adaptive algorithm improve call clarity in various environments.

Suitable for

• Phone and voice calls in noisy environments
• Listening to music, podcasts and audiobooks with emphasis on detail
• Sport and active use requiring secure in-ear fit
• Daily commuting and travel where noise cancellation is needed

Key specifications

• Connectivity: True Wireless Stereo (TWS) Bluetooth
• Ear coupling: Intraaural (in-ear)
• Colour: Black
• Noise cancellation: Multi-sensor adaptive ANC with recalibration every 0.3 s
• Microphones: Multi-microphone array with wind-noise reduction and AI-assisted call processing
• Drivers and sound: 10.5 mm bass driver, titanium-coated tweeter, digital crossover, ACAA acoustic architecture
• Charging: USB Type-C charging, fast charge (5 min ≈ 4 hours playtime)
• Battery life: Up to 10 hours from a single charge, up to 40 hours with charging case
• Audio codecs: LDAC support available via companion app on compatible Android devices

How to use

Charge the earbuds and case via the USB Type-C port before first use. Open the case and remove the earbuds to power them on and initiate Bluetooth pairing; follow device prompts to complete pairing with your phone or player. Fit each earbud into the ear canal for secure intraaural coupling and adjust by testing fit and seal. Use the touch-sensitive controls on the earbuds and the touch bar on the case to change noise-cancelling levels, control playback and answer calls. For LDAC or additional settings, install and use the manufacturer’s companion app on compatible devices.

Usage recommendations

Select an ear tip size that provides a proper seal to maximise passive isolation and ANC performance. Use fast charging for short top-ups when time is limited and fully charge the case regularly to preserve overall battery availability. Enable LDAC in the companion app only on compatible Android devices when higher wireless audio bitrate is required. Clean earbud contact points and ear tips periodically and avoid exposing the charging case to extreme temperatures or moisture.