New Version For  iPod / MP3 / MP4 / PSP / Player ...

Back side of Ear-speaker have 3 hole for increasing Stereo Effect

Driverunits:13mm dia,dome type

power handling capacity:0.15W

impedance:40 ohms at 1 KHz

sensitivity:  119db/mW/frequency range: 10-28,000 Hz

plugs :  3.5 mM