Product parameters1) Driver: 15mm2) Impedance: 32 OHM3) Bluetooth version: Bluetooth v4.1+EDR4) Bluetooth use frequency band: 2.4GHz5) Power level: CLASS II6) Output power: 30mW7) Bluetooth distance: 10 meters barrier-free8) Frequency response: 20-20000Hz9) Voltage range: 3.0V-4.2V10) Microphone sensitivity: -42dB11) A2DP / AVRCP high quality stereo audio transmission and remote control protocol12) Powerful noise cancellation circuit (active noise reduction)Features:1) Listening to songs and calling, supporting listening to songs and making calls,2) IOS mobile phone has a power display, you can watch the power of the headset at any time, don't worry about the lack of power in the headset, let you live without worry;3) One for two connections, two mobile phones can be connected at the same time;4) Each time the Bluetooth headset is connected to the phone, the Bluetooth headset will automatically connect back to the phone when it is turned on, which is convenient and faster;5) Intelligent compatibility: support all mobile phones with Bluetooth function, tablet, notebook, sing, Q music, movies, etc. Battery capacity: 75 mA / with protection boardPlay time: about 5-6 hoursStandby time: about 160 hoursNet weight: 8 gramsGross weight 33 gramsColor: black, silver, red, goldFunction: battery display, call answering, last number replay, song switching, playback pause, volume adjustment