Oppo Enco X True Wireless Noise ETI51

Model (Earphones) : ETI51
Sound unit : 11mm dynamic driver + 6mm balanced membrane dual drivers
Speaker sensitivity : 104dB@1KHz
Frequency response range : 20Hz ~ 20kHz
Microphone sensitivity : -38 dBV/Pa
Bluetooth version : BT 5.2
Wireless range : 10m
Battery type : Rechargeable lithium-ion batteries
Battery capacity : 44mAh (earphones) / 535mAh (charging case)
Wireless charging : Yes
Wired charging time* : 80min (earphones), 110min (charging case)
Charging port : Type-C
Dust and water resistance level (earphones) : IP54
Net weight: 4.8g (52.5g with box)
Charging case size (LxWxD) : 66.3×49×21.7 mm
ANC technology : Max noise cancellation, Noise cancellation, Transparency, Noise Cancellation off
Binaural low-latency Bluetooth transmission : Yes
Audio transmission format : LHDC, SBC, AAC
Control adjustment : Touch control
Multi-device switching : Yes
Third-party apps : HeyMelody (Android only)