Chip: JL6973D4Bluetooth Version: V5.3Earbuds Battery: 28mAhCharging Case Battery: 300mAhPlay Time: 6 hoursTalk time: 4 hoursBuds Charging Time: 1.5 hoursCase Charging Time: 2 hoursUSB Port: Type-CCharging Case Dimension: 48.2*49.5*27mmCharging Net Weight: 33gWireless Working Range: 10M (without obstacles)Speaker Size: 10mm