OPPO has introduced the Enco Free4 earbuds in China, as promised. They provide 55dB active noise cancellation (ANC) across a 5500Hz frequency range, detecting noise 800 times per second for a 200% improvement in human voice suppression, certified by TÜV Rheinland.
- An adaptive mode adjusts ANC or transparency for environments like quiet rooms, busy streets, or commutes to ensure comfort and safety.
- Each earbud has three microphones—feedforward, feedback, and call—using AI to isolate voices for clear calls in noisy settings.
The Star Ceramic Silver variant includes Nordic Dynaudio tuning for rich sound. A coaxial dual-unit system with a 11mm bass driver and 6mm tweeter delivers balanced audio, supported by Hi-Res Wireless Audio via LHDC (192kHz, 1Mbps) and dual DACs. Spatial audio offers a 3D surround effect, and “Golden Listening Sensation” customizes sound via ear canal detection.
AI features include real-time language interpretation, call summaries activated by triple-tapping, and face-to-face translation for seamless communication. Bluetooth 5.4 ensures a 400-meter connection range and stability in high-interference areas like train stations, with 100-square-meter indoor coverage.
Gesture controls and audio switching within OPPO’s ecosystem, such as from tablet to phone, improve usability. Weighing 4.7g each, the earbuds are ergonomically designed, feature IP55 dust and water resistance, and carry TÜV Rheinland certification for battery durability.
The earbuds have an IP55 rating, a 62mAh battery each, and a 530mAh case battery. Battery life reaches 45 hours with the charging case (ANC off, AAC codec), with 5.5 to 11 hours per charge depending on ANC and codec (LHDC or AAC). Charging takes 50 minutes for earbuds and 80 minutes for the Type-C case.
A companion app supports battery monitoring, noise control, spatial audio, game mode, dual-device pairing, theme customization, earbud location, and control adjustments.
Quick specifications: OPPO Enco Free4
- 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
Pricing and Availability
The Enco Free4 earbuds are open for pre-order in China, with sales starting April 16, 2025. The Star Ceramic Silver (Dynaudio Edition) costs 449 yuan (USD 61 / Rs. 5,290 approx.), and the Water Blue variant is priced at 399 yuan (USD 54 / Rs. 4,700 approx.).