Zealot B19 USB charging Zealot B19 TF Card Stereo wireless Bluetooth headset Headphone
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<br /> Note:Only Bluetooth mode can use the microphone.
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<br />parameters 
<br />Bluetooth:BT 4.0 
<br />Working voltage: 3.7V
<br />Distortion: 1%
<br />Speaker: 32 
<br />Charging voltage: DC 5V
<br />Frequency response: 20Hz-20kHz
<br />Signal to noise ratio: 75dB
<br />Call duration: 6h
<br />Music player: 8h
<br />Standby time:   30 days
<br />Charging time: 5h
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<br />Package Included 
<br />1X Bluetooth Earphone
<br />1X user Manual 
<br />1X USB Cable
<br />1X Audio Line