Anker SoundCore Liberty 4 (International)

• Bluetooth version 5.2
• AAC and aptX codecs
• IPX4 water resistance
• 9 hours of playtime on a single charge
• 28 hours of total playtime with charging case
• Fast charging: 10 minutes of charging for 2 hours of playtime
• 3 microphones for AI-enhanced clear calls
• Touch controls for music playback, volume, and voice assistant
• HearID personalized sound with the Soundcore app
• Hybrid active noise cancellation (ANC)
• 360° immersive spatial audio
• All-new heart rate sensor

Here are some of the features of the SoundCore Liberty Air 4:

• Long battery life: The earbuds offer 9 hours of playtime on a single charge, and the charging case provides an additional 28 hours, for a total of 37 hours of listening time.
• Fast charging: A quick 10-minute charge will give you 2 hours of playtime, so you can quickly top up the earbuds when you're on the go.
• IPX4 water resistance: The earbuds are water-resistant to IPX4, which means they can withstand sweat and light rain.
• AI-enhanced clear calls: The earbuds have three microphones with AI noise cancellation to help you make clear calls even in noisy environments.
• HearID personalized sound: You can use the Soundcore app to create a personalized sound profile that's tailored to your hearing.
• Hybrid active noise cancellation (ANC): The earbuds use hybrid ANC to block out up to 90% of ambient noise.
• 360° immersive spatial audio: The earbuds use spatial audio to create a surround sound experience.
• All-new heart rate sensor: The earbuds have a new heart rate sensor that can track your heart rate while you're listening to music.