Specification: 
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<br />Bluetooth Specification: 4.1+ EDR 
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<br />Bluetooth Chips: CSR8645 
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<br />Bluetooth Profile: HFP1.6/HSP1.2/AVRCP1.4/A2DP1.2 
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<br />Supports APT-X Feature (HiFi stereo) 
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<br />RF Range: 10m 
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<br />Noise reduction: CVC 6.0 
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<br />Supports iPhone Battery Display 
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<br />Stand-by time: About 175 hours 
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<br />Calculating Conversation Time: About 4 Hours 
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<br />Charging time: About 1 Hours 
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<br />Dimension (L×W×H):40*24*32mm 
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<br />Package List: 
<br />1X  Sport Bluetooth Stereo Earphone. 
<br />1X  QY7 User Manual. 
<br />1X USB Charger Cable.