Product DescriptionTrucker Wireless Bluetooth 5.0 Earpiece Headset Mic Earbud Noise Cancelling USAFeatures:Upgraded Bluetooth version 5.0, the connection is stableRotating ear-hook design, universal for left and right ears, to meet users with different ear habitsExtended microphone, clear voice calls, more suitable for business conversations, driving callsPhysical buttons to answer and hang up calls, volume adjustment, effectively avoid accidental touchesProduct Parameters:Bluetooth version: V5.0+EDRWireless frequency: 2.4GHZSupported protocols: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3Transmission distance: 15 metersBattery capacity: 50mAhCharging voltage/current: 5V/1APlay/talk time: about 6 hoursCharging time: about 1 hourStandby time: 120 hoursSpeaker impedance: 8MM 32Microphone sensitivity: -42DbWorking temperature: -10-50Packing List: headphone host,Type-C charging cable,manual,Replacement earplugs x2