OPPO Launches Enco Air4s TWS Earbuds for 179 Yuan: 32dB Active Noise Cancellation, 12.4mm Titanized Drivers, and 43-Hour Endurance

Strengthening its footprint in the high-volume budget audio segment, OPPO has officially introduced the OPPO Enco Air4s true wireless stereo (TWS) earbuds in China.

Priced at an introductory 179 Yuan (approximately $26 USD / ~₹2,200 INR), the Enco Air4s is positioned directly beneath the 199 Yuan Enco Air 5, making hybrid noise isolation accessible without breaking the 200-yuan barrier. Despite its entry-level price tag, the Air4s makes zero compromises on core hardware fundamentals: it integrates 32dB Active Noise Cancellation (ANC), oversized 12.4mm titanized diaphragm dynamic drivers, dual-mic AI environmental noise reduction for calls, and an endurance profile delivering up to 43 hours of total playback.

Furthermore, the earbuds carry a dedicated TÜV Rheinland battery health certification guaranteeing sustained cell integrity over multi-year usage cycles.

32dB Active Noise Cancellation and Dual-Mic AI Call Clarity

For budget commuters and students navigating noisy study environments, the Enco Air4s integrates hardware-level noise suppression:

• 32dB Depth Noise Cancellation: The onboard ANC algorithms actively filter out continuous low-frequency environmental noise-such as bus engines, train track rumble, office HVAC humming, and ambient coffee shop chatter-reducing background noise by up to 32dB.
• Dedicated Transparency Mode: When users need to stay aware of surroundings or engage in face-to-face conversations, a single long-press on the earbud stem activates Transparency Mode, feeding external voices and announcements directly through the acoustic monitors without needing to remove the earpieces.
• Dual-Microphone AI Noise Reduction: Voice calls are handled by two high-sensitivity beamforming microphones per bud. The dual-mic array works alongside an AI deep neural network (DNN) algorithm to isolate the user’s vocal frequencies while suppressing wind buffeting and street noise, ensuring vocal clarity during outdoor phone and video meetings.

Acoustic Architecture: 12.4mm Titanized Diaphragm Driver

OPPO’s acoustic division has brought its proven large-driver hardware into the sub-200-yuan price tier:

• 12.4mm Titanium-Plated Drivers: Moving well past the standard 10mm drivers typical of budget earbuds, the Enco Air4s houses 12.4mm extra-large dynamic driver units. The driver diaphragms receive a high-rigidity titanium coating, dampening harmonic distortion and delivering deeper, resonant sub-bass punch alongside full-bodied mid-range vocals.
• Enco Master Equalizer Profiles: Through the companion software, users can cycle between three master-tuned acoustic profiles calibrated by OPPO’s golden ears sound team: Bass Boost (for hip-hop and electronic genres), Clear Vocals (for podcasts and acoustic tracks), and Original Sound (for a balanced, flat studio response).
• OPPO Alive Audio Spatial Algorithms: The earbuds feature OPPO’s proprietary Alive Audio spatial sound algorithm, expanding the acoustic soundstage to simulate an immersive, three-dimensional live-house listening environment across movie streaming and mobile gaming.

43-Hour Battery Endurance with TÜV Rheinland Health Rating

Battery degradation is one of the most common reasons consumers replace budget TWS earbuds after 12 to 18 months. OPPO directly tackles this pain point with certified cell chemistry:

• Hyper-Durable Battery Certification: The Enco Air4s is backed by TÜV Rheinland Battery Health Certification. The internal lithium-ion cells are engineered with low-wear cathode materials, retaining ≥80% of their original capacity even after 1,000 complete charging cycles-representing roughly three to four years of regular daily use.
• 43 Hours of Total Playback: Each earbud packs a 58mAh battery, while the sleek charging case integrates a 440mAh cell. With ANC disabled, the earbuds provide up to 12 hours of continuous music playback on a single charge, expanding to 43 hours total with the case. With ANC or Transparency enabled, the earbuds deliver a dependable 8 hours of standalone listening.
• Flash Fast Charging: A brief 10-minute top-up via USB Type-C delivers up to 4 hours of music playback, eliminating battery anxiety before daily workouts or transit trips.

Rugged Durability and Lab Testing

OPPO subjected the Enco Air4s to extensive mechanical stress tests to ensure real-world resilience:

• IP55 Dust and Water Resistance: The earbuds carry an IP55 ingress rating, protecting internal drivers and microphone meshes against dust accumulation, heavy rain showers, and intense gym perspiration.
• Drop and Hinge Verification: In factory reliability testing, the charging case hinge survived more than 20,000 opening and closing cycles. The charging case was drop-tested from 1.5 meters, while the individual earbuds were tested against concrete drops from 1.8 meters without functional failure.
• Thermal Stress Resistance: The internal circuitry and batteries operated without degradation during environmental chamber testing reaching temperatures as high as 55°C.

OPPO Enco Air4s vs. Enco Air 5 vs. Enco Air4 Pro

Seamless Software and Bluetooth 5.4 Connectivity

The Enco Air4s is built to integrate effortlessly across diverse mobile ecosystems:

• Bluetooth 5.4 Low-Latency Link: Running on the modern Bluetooth 5.4 standard, the earbuds offer enhanced resistance to 2.4GHz RF interference in crowded transit hubs and maintain a low audio-visual latency for gaming and streaming.
• Dual Connection Multi-Point: Users can pair the earbuds simultaneously to two separate devices—such as a work laptop and a smartphone. When an incoming phone call rings, the earbuds automatically pause desktop video playback and route the phone audio without manual menu reconnection.
• Google Fast Pair & HeyMelody App: On Android devices, opening the charging case triggers an automatic Google Fast Pair pop-up card. For iOS and non-OPPO Android users, the comprehensive HeyMelody app allows full customization of tap-and-hold gestures, EQ mode selection, low-latency game mode toggling, and firmware OTA updates.

Market Positioning and India Release Outlook

At 179 Yuan, the launch of the Enco Air4s reinforces OPPO’s aggressive strategy in the ultra-competitive sub-₹2,500 audio tier:

1. Undercutting Regional Competitors: In price-sensitive markets like India and Southeast Asia, domestic brands like boAt, Noise, and Boult dominate the sub-₹2,000 bracket. However, few budget alternatives combine 32dB active noise cancellation with 12.4mm titanized drivers and a certified 1,000-cycle battery lifespan.
2. Complementing the Enco Family: While the Enco Air4 Pro targets audiophiles who demand LHDC 5.0 24-bit Hi-Res audio transmission and deep 49dB ANC, the Enco Air4s strips away expensive codec licensing fees to focus strictly on durability, punchy everyday acoustics, and battery life.
3. Anticipated India Debut: Historically, OPPO introduces its China-launched Enco Air-series models to the Indian market within six to eight weeks, often bundled alongside mid-range Reno or F-series smartphone launches. Indian buyers can expect the Enco Air4s to arrive at an estimated price point of ₹2,299 to ₹2,499 via Flipkart and Amazon India over the coming quarter.

The OPPO Enco Air4s is available for purchase in China starting October 15, 2026, through the official OPPO Store and major retail partners in Midnight Black and Deep Blue finishes.