... competitive price 5.stylish ,OEM,ODM MDR-397 sport earphone headset 1.fashionable Headphone 2.super bass headphone 3.pass CE ... ,OEM,ODM metallic earphones, nice design and excellent sound Foldable headset specification: Speaker size:40mmSensitity:115dB+3dBImpedance:32ΩFrenquency response:10 ...