1.Bluetooth 5.3 

    Bluetooth chipset: AD6973D4

2.Bluetooth profiles: AVRCP_V1.6/HFP_V1.7/HSP_V1.2/A2DP_V1.3

3.Operating distance: 10 meters Class II

4.Charging Box Battery with protection: 300mAh 

5.Earbud Battery  : 33mAh 

6.Talk time:  Around 3.5 hours                                                                               
7.Music playing time: Around 5 hours

8.Easily charge TYPE-C port

9.Charging time: About  1.5 hours

10.Box charge earbud : 3 times