Bluetooth version: Bluetooth 5.0.
Battery capacity: 55 mAh .
Working Time: about 4 hours .
Standby time: 120 hours .
Tube diameter: 10 (mm) .
Speaker impedance: 16 .
Sensitivity: 99 ~ 3 dB / mw (dB) .
Speaker power: 3-5 MW .
Beautiful packaging, excellent quality.
Good quality materials
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