DescriptionHeadset parameters1.Wireless Version :V5.0+EDR2.Wireless Frequency:2.4GHz~2.4835GHz3.Earbud Capacity :45mAh4. Transmission Distance:10M5.Hours of use: 3 hours of talk, 3 hours of music playback6.Standby Time:about 200 hours7.earphone Charging Time: about 1 hours8.earphone Weight:4.5gCharging Case Parameters:1.Input current :5V 1A(TYP)2.Charging Case Capacity:300mah3.Case Charging Time: about 1 hoursPackaging Information:1*M2 Earbuds(No Box)