Specifications Brand: Oppo Model Name: ETEK1 Color: Glaze White, Graphite Grey Audio Quality Driver: φ12.4mm Dynamic Driver Driver sensitivity: 114 ± 3dB@1KHz Frequency response range: 20~20KHz Microphone sensitivity: -38dBV/Pa Bluetooth® codec: AAC/SBC Bluetooth® version: Bluetooth® 5.4 Bluetooth® range: 10m Charging: ASAP Charging Time: 10 mins for 4h (single charge)/8h (with charging case) Charging input (charging case): 5V ⎓ 0.9A Charging input (earbuds): 5V ⎓ 0.17A Charging output (charging case to earbuds): 5V ⎓ 0.35A Charging Port: Type-C Water resistance (earbuds): IP55 Weight (earbud): 4.3g ± 0.2g Weight (earbuds + charging case): 42.7g ± 2g Size (earbud): 3.11cm * 2.03cm * 2.33cm Size (charging case): 5.92cm * 2.40cm * 4.75cm Country of Origin: India Battery type: Rechargeable Li-ion Cell Battery capacity: 58mAh (earbuds)/560mAh (charging case) Music play time (AAC, Default setting, 50% volume)*: 12h (single charge)/54h (with charging case)