OPPO Enco X4 - Specifications

OPPO Enco X4 True Wireless Noise Cancelling Earbuds

Glacier White | Aurora Violet

* The above image is for reference only. Please refer to the actual product for all criteria.

Earphone

Model

ETEM2

Audio Quality

Driver

Dual-Driver Design: 11mm Woofer + 6mm Tweeter

Driver Sensitivity

Woofer: 122±2dB, 0.3V 711 @1kHz
Tweeter: 108dB±8dB, 0.3V 711 @10KHz

Frequency Response Range

10 Hz~40 KHz

Microphone Sensitivity

-37 dBFS

Bluetooth®

Bluetooth® Codec

AAC, SBC, LHDC, LC3

Bluetooth® Version

Bluetooth® 6.1

Bluetooth® Range

10m

Battery Life

Battery Type

Rechargeable Li-ion Battery

Battery Capacity

65 mAh (earbuds)/576 mAh (charging case)

Playback

Playback (AAC, default settings, 50% volume, ANC On): 6h (earbuds)/26h (earbuds + charging case)
Playback (AAC, default settings, 50% volume, ANC Off): 13h (earbuds)/53h (earbuds + charging case)
Playback (LHDC, default settings, 50% volume, ANC On): 5.5h (earbuds)/22h (earbuds + charging case)
Playback (LHDC, default settings, 50% volume, ANC Off): 10h (earbuds)/42h (earbuds + charging case)
Playback (AAC, default settings, 50% volume, transparency mode): 5.5h (earbuds)/22h (earbuds + charging case)
Playback (LHDC, default settings, 50% volume, transparency mode): 5h (earbuds)/21h (earbuds + charging case)

Talk Time

Talk Time (ANC On): 5h (earbuds)/20h (earbuds + charging case)
Talk Time (ANC Off): 6h (earbuds)/24h (earbuds + charging case)
Talk Time (transparency mode): 4.5h (earbuds)/19h (earbuds + charging case)

* The above specifications were obtained based on tests performed in OPPO laboratories. Charging times were tested in OPPO laboratories at a temperature of 25°C using an OPPO standard charger. The actual results may differ slightly depending on environmental factors and the charger used.

Charging

Charging Time

55mins (earbuds)/65mins (earbuds + charging case)

Charging Input

(charging case): 5V ⎓ 1.5A
(earbuds): 5V ⎓ 0.2A

Charging Output

(charging case to earbuds): 5V ⎓ 0.4A

Charging Port

USB Type-C

Water and dust resistance

Water Resistance (Earbuds)

IP55

Size

Weight (Earbud)

5.6 g (±0.3 g)

Weight (Earbuds + Charging Case)

50.9 g (±2 g)

Size (Earbud)

32.11×18.19×21.03 mm

Size (Charging Case)

63.40×49.50×25.55 mm

Remarks

* OPPO's laboratory has been accredited by China National Accreditation Service for Conformity Assessment (CNAS), and its test reports are directly mutually recognized in 106 economies worldwide, including those under the International Accreditation Forum (IAF), International Laboratory Accreditation Cooperation (ILAC), and Asia Pacific Accreditation Cooperation (APAC).