Amazon | Energy Sistem Sport 1 Bluetooth Earphones (Red)

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 Created for workouts. Designed to enjoy.  Bluetooth earphones for sport lovers, great sound and functionality. You can answer your calls and control music playing while working out. All this with a Secure-fit system.   Features:  CONNECTIVITY  Bluetooth v4.1, Class II  Range: Up to 10 m.  DRIVERS Frequency response: 20 Hz ~ 20 KHz Diameter: 6 mm SPL: 103±3dB THD < 1%  MICROPHONE Sensitivity: -42 dB±3 dB (@1 Khz)  
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