Itemwireless bluetooth earphoneFunctionsupport call&music/incoming number calling /redial last number /Chinese&English voice prompt/connect two BT devices at the same time/powerful active noise reductionMaterialABS (shell passed UV)Plug TypeUSBPower supplyBuilt-in lithium battery/DC5V power supply [round hole interface]ColorBlack, whiteSize2*0.6*5cmN.W41gBluetooth VersionV4.2+EDR , real stereoAmplifier30mW*1ChargerDC5VBluetooth Distance10-15 M without obstacleFrequency2.4GHzBattery Capacity55mah (charging station battery capacity:550mah)WorkingTime2-3 hoursStandbyTime100 hoursChip6904FPackage Size45*54mmG.W110gPackage Accessories1 pair earphones+charging station+package boxPayment itemsTrade assurance,Western Union,Paypal,L/C,T/T,etc