Hign quality Single-side earphones SM-X3, New Trend of the times, More easier to enjoy.  
  Microphone: 6*5/58±2dB
Loudhailer: Φ15mm
Impendance: 32ohm

Microphone Sensitivity: 107dB
Ratedpower: 100mw
Jack: Φ3. 5mm hi-fi plug*2
Frequency: 20Hz-20, 000Hz
Cord Length: 1800±50mm