Bluetooth 5.3 wireless earphones

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Material: ABS and TPU
Bluetooth control main chip: BLUETRUM AB5656C
Bluetooth version: 5.4
Transmission distance: 10m
Speaker units: Φ14.2mm
Earphone lithium battery capacity: 50mAh*2
Impedance: 16Ω±15%
Charging case lithium battery capacity: 400 mAh
Input: Type-C 5.0V--0.3A
Microphone sensitivity: -42dB±3dB
Music playing time: 6 hours (under 70% volume)
Talk time: 4 hours
Charging time: ≤1.5 hours
Dimensions: Earphones, 49.8*36.8*21.39mm