Main Features Specifications Wireless Connection: Bluetooth 5.2 Communication Distance: 10 meters (barrier-free open environment) Net Weight of Single Earphone: about 4.9g Headphone Size: 25.4*20.3*21.3mm Total Weight With Charging Case: about 55g Charging Box Size: 65*48*26mm Headphone Charging Time: less than 1 hour Charging Time of Charging Box: about 2.5 hours (using wired charging) Talk Time: about 3 hours (noise reduction turned off, 50% volume, AAC encoding) Music Time: about 6 hours (noise reduction turned off, 50% volume, AAC encoding) Standby Time: about 28 hours (noise reduction turned off, 50% volume, AAC encoding), Cooperate with the charging box Charging Interface: Type-C Charging Box Input Parameters: 5V=0.5A MAX (wired) Single Battery Rated Capacity/energy: 35mAh/0.13Wh Earphone Input Parameters: 5V=120mA MAX (single headphone) Power Box Battery Rated Capacity/Energy: 470mAh/1.78Wh Speaker Impedance: 32Q Packing List Earphone - 2 Charging Box - 1 Charging Cable - 1 Manual - 1