1, can be used for ipod/iphone/mp3/mp4 player. New and hot, Feel the sound difference with vibrant bass, vivid mid-range; 2, cool design , . 3, advantage price and high quality for mass purchase 4, high quality and powerful sound 5, beautiful pakage for your retail 6, oem service accpeted Specifications: Speaker size: 5mm+8mm Sensitivity: 105db+3db Impedance: 16|¸ Frenquency response: 20-20khz Cable: 1.2m Plug size: 3.5mm Power: 10mw Max output power: 20mw Level difference of l-r: ¡¡¡ì13db at 500hz-1000hz Distortion Less than 5% at 1khz 2mw Plug type Straight 3.5mm golden plated Cable Flat cable 1pc/color box