Features100% brand new and high qualityMagnetic suction design, easy to wear3D stereo, Leisure listen to the music, CallVolume adjustment, Chinese and English voice switching,Call voice number functionThe last number of redialOperation voice prompt function,IOS system shows the power,Support WeChat, car navigation, QQ voice and other softwareSpecificationColor:Black,Gold.Bluetooth chip and Bluetooth version: csr 4.1Bluetooth protocol: A2DP AVRCP HFP HSPBattery: 3.7V 60mAhCharging power: 5V / 80mAhSensitivity: 103db +/- 3dBImpedance: 32MwTransmission distance: barrier 10mFrequency: 2.4GHZTalk time: about 4 hourssongs time: about 5 hoursStandby time: about 160 hoursProduct weight: 18gInstruction manual1,Power on the machine: long press the power button for 3 seconds2,Into the pairing: long press the key for 5 seconds into the paired state3,Volume plus or minus: short press the volume plus the key is to adjust the volume plus, short press the volume down key is to adjust the volume minus4,To switch between Chinese and English: in the pairing state, double-click the power button5,Play Pause: Short press the power button6,Previous: Volume - key press 2 seconds7,The next song: volume + key press 2 seconds8,To answer the phone: short press the power button9,Refused to answer the phone: long press the power button10,Last Replay: Double-click the power button; then press the power button to cancel the dialPackage  Included1 x Bluetooth headphone1 x USB Charging Cable1 x ManualOther AccessoryNO Retail Box. Packed Safely in Bubble Bag.