Bluetooth version:V4.2 Battery capacity:135 mAh
Standby time:>120 hours
Use time:7.5 hours.
Effective distance:10M
Speaker specification:Φ10mm
Headphone weight:40g
Charging voltage: USB 5V
Working voltage:3.4V ~4.2V
Frequency response:2.402G ~ 2.480G
Frequency range:20Hz ~ 20KHz
Charging time:≤2h.