Earphone

Model: ETE51
Charging case model: ETE52

Audio quality

Driver: 12.4mm Dynamic Unit
Driver sensitivity: 107dB @1KHz
Frequency response range: 20~20KHz
Microphone sensitivity: -38dBV/Pa

Bluetooth®

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

Battery Life

Battery type: Rechargeable Lithium-ion Battery
Battery capacity: 43mAh (earbuds) / 440mAh (charging case)
Communication time (50% volume): 7h (single charge) / 30h (with charging case)

Charging

Charging time: 90M (earbuds) / 120M (earbuds + charging case) 
Charging input (charging case): 5V 1A
Charging output (charging case to earbuds): 5V 0.2A
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): IP55

Size

Weight (earbuds): 4.3g±0.1g
Weight (product): 47.3g±0.2g
Size (earbuds): 33.01mm*20.3mm*23.15mm
Size (package): 65.84mm*50.45mm*24.81mm