Earphone
Model: ETE81
Charging case model: ETE82

Audio Quality
Driver: φ13.4mm Dynamic Unit
Driver sensitivity: 125±3dB @1KHz
Frequency response range: 20~20KHz
Microphone sensitivity: -38dBV/Pa

Bluetooth®
Bluetooth® codec: AAC/SBC
Bluetooth® version: Bluetooth® 5.3
Bluetooth® range: 10m

Battery Life
Battery type: Rechargeable Lithium-ion Battery
Battery capacity: 27mAh (earbuds) / 300mAh (charging case)
Communication time (50% volume): 6H (single charge) / 25H (with charging case)

Charging
Charging time*: 1.2H (earbuds) / 2H (earbuds + charging case)
Charging input (charging case): 5V 1A
Charging output (charging case to earbuds): 5V 0.4A
Charging port: USB Type-C
* 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.

Water and dust resistance
Water resistance (earbuds): IP54

Size
Weight (earbud): 3.7g±0.1g
Weight (earbuds + charging case): 37.2g±0.2g
Size (earbud): 33.1mm * 18.45mm * 17.10mm
Size (charging case): 56.55mm * 51.6mm * 26mm