Product Included 1 xbluetooth Earbuds3 Pairs x Earbuds Large Middle Small 1 x Manual1 x USB Charging Cable1 x Power BoxSpecification Color Black WhiteWorking voltage 3 7VCharging voltage 5V 50mAFrequency effect 10 20KHZHeadphone size 2 5x1 7x1 6cmbluetooth reception 10mbluetooth 5 0Bluetooth indicator Pairing status red and blue flashing alternatelyConnection status 5S flash onceMusic status flash once in 10SPhone status bluetooth 5S flash oncePower on blue light on for 1SShutdown status the red light is on for 1SLow power status the red light flashes quickly Features Automatic power on and pairing Taking the headset out of the battery compartment will automatically start pair connect back bluetooth 5 0 chip communication effect compatibility and other aspects significantly improved The use of bass enhancement technology deep and deep sound Touch the button a key operation fashion simplicity Ultra clear sound quality hearing position clear step near 0 delay 10 meters barrier free transmission stable signal enjoy the convenience brought by wireless restraint Easy to carry comfortable to wear magnetic charging box Mini battery compartment for lasting battery life