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