Brand: Fineblue Model: Fineblue HF88 Bluetooth: V4.0 + EDR Transmission Range: 10 m Transmit Power: 2.4 GHz Charging Voltage: DC 5 V Talk Time: About 4 Hours Music Time: About 4 Hours Standby Time: About 120 Hours Brand: Fineblue Model: Fineblue HF88 Bluetooth: V4.0 + EDR Transmission Range: 10 m Transmit Power: 2.4 GHz Charging Voltage: DC 5 V Talk Time: About 4 Hours Music Time: About 4 Hours Standby Time: About 120 Hours