Vocalism Principle: dynamic
Chip: Bluetrum
Codec: SBC
Bluetooth version: 5.0
Support protocol: HSP/HFP/A2DP/AVRCP...
Battery: bulit-in li-ion battery
Battery capacity: 90 mAh
Charging voltage current: DV5V, 80MA
Transmission radius distance: 10M
Music time: about 5 hours
Talk time: about 5 hours
Standby time: about 15 days
Charging time: about 2 hours
Software language: English
Sensitivity: 110 dB
Impedance: 16 Ω
Speaker size: 14 mm
Frequency response range: 50-20K hz