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OPPO Enco Buds 2 
Earphone
Model: ETE41
Charging case model: ETE42
Audio quality
Driver: 10 mm dynamic driver
Driver sensitivity: 101 dB @ 1 kHz
Frequency response range: 20 Hz - 20 kHz

Bluetooth
Bluetooth codec: AAC/SBC
Bluetooth version: 5.2
Bluetooth range: 10 m

Battery Life
Battery type: Rechargeable Li-ion Cell
Battery capacity: 40 mAh (Earbuds) / 460 mAh (Charging Case)
Music play time (50% volume): 7 h (single charge)/ 28 h (with Charging Case)
Communication time (50% volume): 4 h (single charge)/ 16 h (with Charging Case)

Charging
Charging time: 90 min(Earbuds)/ 200 min( Earbuds + Charging Case)
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. The charging cable is not included in the product package.
Water and dust resistance
Dust & water resistance (Earbuds): IPX4

Size
Weight: 4.0 g/Earbud，30.0 g/Charging Case, 38.0 g/Product
Size (Charging Case): 57 mm*57 mm*25.6 mm
Size (Earbud): 35.2 mm*20.3 mm*23.3 mm
Size (Package): 100 mm*100 mm*32 mm