OnePlus Buds 4 TWS In Ear Earbuds Active Noise Cancellation Gaming Headphones Low Latency Bluetooth Custom Earbuds Original

Product parameters
Product model: E513A
Vocal unit; 11mm+6mm dual dynamic coil speaker
Speaker sensitivity: 118 ± 1.3dB @ 1mW
Frequency response range: 15Hz-40kHz
Microphone sensitivity: -38 ± 1dB
Bluetooth codec: LHDC5.0/AAC/SBC
Bluetooth version: 5.4