oppoencofree2i

Name: OPPO Enco Free true wireless headphones

Headphone model: ETI02

Headphone color: Tian white, hidden black, proud pink

Sound unit: 13.4mm dynamic coil

Frequency response range: 16Hz-20kHz

Microphone sensitivity: -42dBV/Pa

Waterproof level: The headphones are IPX4 waterproof Design (headphone box is not waterproof)

Noise reduction mode: supports uplink noise reduction during calls, using wind noise-proof cavity design

Bluetooth codec: AAC/SBC

< p>Bluetooth transmission protocol: BLE/HFP/A2DP/AVRCP

Bluetooth version: 5.0

Bluetooth effective distance: 10m

Weight: single headset 4.6g , charging box 39g

Battery type: rechargeable lithium-ion battery

Battery capacity: 31mAh (single earphone)/410mAh (charging box)

Music playback Time (50% volume): 5h (headphones fully charged)/25h (with charging box)

Charging time: 70min (headphones)/110min (charging box)

Charging box model : ETI03

Charging input (charging box): 5V_1A

This answer applies to all OPPO models.