- Product Model: BS581

- Bluetooth Version: V5.3

- Bluetooth Profiles: HFP,HSP,A2DP,AVRCP

-Transmission Distance: UP to 10 meters

- Talk Time*: UP to 3.5 hours

- Playing Music Time*:UP to 6.5 hours

- Standby Time*: UP to 70 hours

- Battery (Headset/Base):35mAh/430mAh

- Charging Time: 2hours

-Driver: φ12mm

- Driver Sensitivity: 102±3dB @1KHz

- Impedance:32Ω±15%

- Frequency Response: 20Hz-20KHz

- Audio Decoding: SBC, AAC