OPPO Enco Free4

Oppo Enco Free 4 is equipped with a 11mm woofer and a 6mm tweeter,dual digital to analogue converters (DAC),  the Silver variant is tuned by Dynaudio 

• Drivers: 11mm bass + 6mm planar tweeter
• ANC: Up to 55dB, adaptive, TÜV certified
• Mics: 3 per earbud, AI call noise cancellation
• Audio: Hi-Res, LHDC 5.0, AAC, SBC, Dual DAC
• Spatial Audio: Yes, with personalized tuning
• Smart Features: AI translation, call summary, face-to-face interpreter
• Battery Life AAC Codec: ANC off: 11h (buds) / 45h (with case); ANC on: 6h (buds) / 24h (with case)
• Battery Life LHDC Codec: ANC off: 9h (buds) / 37h (with case); ANC on: 5.5h (buds) / 22h (with case)
• Charging: USB-C, ~50 min (buds), ~80 min (case)
• Bluetooth: v5.4, up to 400m range
• Water Resistance: IP55
• Weight: ~4.7g per earbud