● BT Specification:  Bluetooth V5.3
● BT Chipset: JL AC7003
● Noise Reduction Rate:  About -22dB
● Built-in ANC mode, Transparent mode.                                                                             
   BT Profiles Supported:  A2DP, AVRCP, HFP, HSP.
● Operating Distance:  10 meters
● Speaker diameter: 10mm
● Impedance:  16 Ohm
● Sensitivity:  95dB at 1KHz
● Frequency Range:  20Hz – 20KHz
● Battery Capacity (Each ear bud)  :  40mAh
● Battery Capacity (Charging Dock):  400mAh
● Calling time(ANC On): 5 hours
● Calling time(ANC Off): 5.5 hours
● Music play time (ANC On): 5.5 hours
● Music play time (ANC Off): 6.0 hours
● Play cycles per full charge: 5 rounds
● Battery life per full charge: 30 Hours
● Charging time: 2 hours
● Stock: Type