soundcore by Anker K20i Semi-in-Ear Wireless Earbuds
The soundcore by Anker K20i Semi-in-Ear Wireless Earbuds (Model: A3994) combine non-intrusive, tip-free ergonomic comfort with powerful audio output. Weighing just 3.3 grams per earbud, they feature large 13mm dynamic drivers enhanced with BassUp™ technology for rich bass and crisp acoustic profiles. Dual microphones integrated with AI-powered noise reduction ensure clear hands-free calling in ambient environments. With stable Bluetooth 5.3 connectivity, an IPX5 water-resistance rating for sweat protection, and deep customization via the soundcore app (22 EQ presets and low-latency Game Mode), the K20i offers an impressive total battery life of up to 36 hours.
- Semi-In-Ear Featherlight Comfort: Tip-free design weighing only 3.3g per earbud provides a pressure-free, comfortable fit for extended daily wear.
- 13mm Dynamic Drivers with BassUp™: Large audio drivers paired with torus acoustic design deliver deep bass resonance and clear vocal reproduction.
- AI Dual-Mic Noise Reduction: Integrated dual microphones isolate vocal input while filtering out background noise for crisp voice calls.
- 36-Hour Extended Battery Life: Up to 6 hours of continuous earbud playback plus 30 additional hours provided by the 700mAh charging case.
- soundcore App Customization: Personalize touch controls and choose from 22 preset EQ curves or tailored gaming modes.
Technical Specifications
| Feature | Specification |
|---|---|
| Brand / Model | soundcore by Anker / K20i (Model: A3994) |
| Form Factor | Semi-In-Ear (Ear tip-free) True Wireless Earbuds |
| Audio Driver Size | 13 mm Dynamic Driver with Torus Design |
| Frequency Response & Impedance | 20 Hz – 20,000 Hz / 16 Ω |
| Audio Enhancements | BassUp™ Technology, 22 App EQ Presets, Dedicated Game Mode |
| Microphone System | Dual Microphones with AI Environmental Noise Reduction (ENC) |
| Bluetooth Version & Range | Bluetooth 5.3 / Up to 10 Meters (33 Feet) |
| Earbud Battery Capacity | 43 mAh per earbud |
| Charging Case Capacity | 700 mAh |
| Earbud Playtime | Up to 6 Hours (at 50% volume) |
| Total Playtime (With Case) | Up to 36 Hours Total Endurance |
| Fast Charging Capability | 10-Minute Fast Charge = 2 Hours Playtime |
| Charging Interface & Time | USB Type-C (Case: ~3 Hours / Earbuds: ~1 Hour) |
| Water Resistance Rating | IPX5 Water & Sweat Resistance (Earbuds only) |
| Control Type | Customizable Touch Controls |
| Companion App Support | soundcore App (iOS & Android) |
| Earbud Weight | 3.3 g per earbud |
| Warranty | One-year brand warranty. |
Frequently Asked Questions
What battery or energy specifications are listed?
Earbud Battery Capacity: 43 mAh per earbud.
What charging specification is listed?
Charging Case Capacity: 700 mAh.
How does this product connect?
Bluetooth Version & Range: Bluetooth 5.3 / Up to 10 Meters (33 Feet).
What noise-control features are listed?
Frequency Response & Impedance: 20 Hz – 20,000 Hz / 16 Ω.
Which connection ports are listed?
Charging Interface & Time: USB Type-C (Case: ~3 Hours / Earbuds: ~1 Hour).
What speaker or driver specification is listed?
Audio Driver Size: 13 mm Dynamic Driver with Torus Design.
What is the exact model reference?
Brand / Model: soundcore by Anker / K20i (Model: A3994).
Does a wireless connection guarantee every audio feature?
No. Audio codecs, microphones, app features and device switching depend on this model and the connected device. Use only the features listed for this exact product.
Will battery runtime be the same for every listener?
No. Where a battery figure is stated, runtime varies with volume, connection, enabled features and battery condition. A stated maximum is not a fixed everyday runtime.
Which exact item does this listing identify?
soundcore by Anker K20i Semi-in-Ear Wireless Earbuds — SKU: ME-000559
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