We could supply all kinds of earphones with packing,

Resistance: 16ohm+/-10%

Rated Impedance: 17ohm+/15% at 1Khz

Sound Pressure Level(SPL): 100+/3 dB SPL at 1KHZ 1mW

Resonance Freq (F0): 220Hz+/-20% at 1mW, free field

Frequency response: F0 to 20 KHZ

Different between L& R: Within 3DB at 1KHZ

THD: less 2%@ 1KHZ, -15dbrms, < 5%@1KHZ, -6dbrms

Rated input power(20Hz to 20KHZ): 3mW

Maximum input power: 5mW
proper to:MP3/mobile phone/MP4