Bluetooth 5.2
About 27 hours of listening time or 23 hours of talk time, and about 12.5 days of standby time. Fast charging through Type-C, charging time is about 2 hours.
Speaker: φ40mm/ Sensitivity: 116±3db/ Impedance: 32±15%Ω/ Frequency response: 20~20KHz
Microphone: Omni-directional/ Mic unit diameter: φ6.0±5.0mm/ Mic Sensitivity: -35±3db/ 
Cable: 1.80±0.01m/ 4-pole 3.5mm audio jack