Maximum OSPL90::≤118±2dB
High frequency average OSPL90 109±4dB
Full on gain:30±2db
Input nosie:≤29±3db
Total harmonic distortion:≤2%
Frequency:200-8000HZ
Charging box:350mAh
Battery capacity: 60mAh*2
Earphone Charging time: 60mins
Charging box Charging time: 1.5hours
Working time:15hours
Standby time:100hours