Bluetooth chip and Bluetooth version: Realtek  V5.0+EDR

Bluetooth protocol: HSP1.2, HFP1.6, A2DP1.3, AVRCP1.5

Earphone battery: Single 60mAH 

Charging box battery: 500mAH 

Charging power: earphone 3.7V

Transmission distance: 15 meters

Frequency: 2.4GHz-2.48GHz

Playing time: up to 6.5 hours

Standby time: about 1800h                                                                                          

Active Siri or Android voice assistant, Energy Saving, 

Answer/End/Reject/Recall/Previous songs/Next songs, 2 earbuds call fucntion.                                                                                                      Charging time (headphones): Approx. 1.1 hours

Charging time (charging box): About 1.5 hours

Charging times (charging box): 3 times                        

Package box size 110*75*40mm