Sleep earbuds Bluetooth Version: 5.3Battery inside earbuds: 60mAhWorking time: 3-5hoursStandby time: 168hoursImpedance: 32ohmFrequency: 20-20kHzSensitivity: 85+-3dBWorking distance: about 10mCharging time: about 1-2hoursCharging conntector:Micro USBCharging cable includedColor: Black
