-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.