• Model – A3957H21 (Series: A3957)
• Type – True Wireless In-Ear Earbuds
• Drivers – 9.2mm Wool-Paper Diaphragm Drivers
• Sound – Hi-Fi Sound + Bass Tubes + Dolby Audio + Hi-Res Audio (LDAC supported)
• Noise Cancelling – Adaptive ANC 3.0 (real-time adjustment every 0.3s) + 2× stronger voice reduction vs Liberty 4 NC
• Transparency – Transparency Mode (extra mics on each bud)
• Calls – 6 Mics + AI + wind-resistant algorithm
• Connectivity – Bluetooth 5.4
• Multipoint – Yes (dual connections, even with LDAC enabled)
• Fast Pair – Google Fast Pair (compatible devices)
• Water/Dust Resistance – IP55
• Playtime (Normal/ANC Off) – up to 12H / up to 48H with case
• Playtime (ANC or Transparency On) – up to 8H / up to 32H with case
• Playtime (ANC + Dolby Sound) – up to 5H
• Playtime (Dual Connections with LDAC/Dolby) – up to 4H
• Fast Charging – 10 mins = up to 5 hrs
• Charging Time – earbuds: about 50 mins
• Case Charging (wired) – without earbuds: about 2 hrs / with earbuds: about 2.5 hrs
• Case Charging (wireless) – without earbuds: about 3.5 hrs / with earbuds: about 4 hrs
• Controls – Earbud stem controls + remote camera shutter control
• Weight – 4.6g per earbud (without case)