ProductSpecificationsProduct name: Wireless Bluetooth earbuds proBluetooth version: V5.3+EDR ultra-low power consumptionFrequency: 2.4GHzMicrophone sensitivity: 42dBBluetooth distance: about 15mHeadset weight: about 3.5gBattery capacity: 45mAh (Bluetooth headset) 450mAh (charging box).Charging power supply. DC5VStandby time: up to 100 hoursMusic/talk time: 3-5 hoursCharging time: about 1 hourPackagingCharging case x 1USB cable x 1User Manual x 1Wireless earbuds pro x 2